How to save space when writing equations with cases?












1















I am writing in IEEE double column environment. I have some equations with cases. For example, this equation seems to have too much space after the brace and also before and after the commas.



enter image description here



I was using the array environment which seems to cause those large spacing. I still prefer to have some independent control over the alignment of the three parts of the equation, since in some cases for each column, the length may be quite different, and I may choose to center, left, or right align for each column. What would be a good way to make those spacings smaller but still have control over the alignment?



The code I used for the equation is 



begin{equation}

theta_{pk}=left{ begin{array}{ccc}

omega t+alpha+beta & , & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta & , & n=7,8,9,10,11,12,ldots

end{array}right.

end{equation}





math-mode spacing







share|improve this question


















  • 5





    There exists an environment for that: cases.

    – marmot
    7 hours ago
















1















I am writing in IEEE double column environment. I have some equations with cases. For example, this equation seems to have too much space after the brace and also before and after the commas.



enter image description here



I was using the array environment which seems to cause those large spacing. I still prefer to have some independent control over the alignment of the three parts of the equation, since in some cases for each column, the length may be quite different, and I may choose to center, left, or right align for each column. What would be a good way to make those spacings smaller but still have control over the alignment?



The code I used for the equation is 



begin{equation}

theta_{pk}=left{ begin{array}{ccc}

omega t+alpha+beta & , & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta & , & n=7,8,9,10,11,12,ldots

end{array}right.

end{equation}





math-mode spacing







share|improve this question


















  • 5





    There exists an environment for that: cases.

    – marmot
    7 hours ago














1












1








1








I am writing in IEEE double column environment. I have some equations with cases. For example, this equation seems to have too much space after the brace and also before and after the commas.



enter image description here



I was using the array environment which seems to cause those large spacing. I still prefer to have some independent control over the alignment of the three parts of the equation, since in some cases for each column, the length may be quite different, and I may choose to center, left, or right align for each column. What would be a good way to make those spacings smaller but still have control over the alignment?



The code I used for the equation is 



begin{equation}

theta_{pk}=left{ begin{array}{ccc}

omega t+alpha+beta & , & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta & , & n=7,8,9,10,11,12,ldots

end{array}right.

end{equation}





math-mode spacing







share|improve this question














I am writing in IEEE double column environment. I have some equations with cases. For example, this equation seems to have too much space after the brace and also before and after the commas.



enter image description here



I was using the array environment which seems to cause those large spacing. I still prefer to have some independent control over the alignment of the three parts of the equation, since in some cases for each column, the length may be quite different, and I may choose to center, left, or right align for each column. What would be a good way to make those spacings smaller but still have control over the alignment?



The code I used for the equation is 



begin{equation}

theta_{pk}=left{ begin{array}{ccc}

omega t+alpha+beta & , & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta & , & n=7,8,9,10,11,12,ldots

end{array}right.

end{equation}





math-mode spacing




math-mode spacing






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 7 hours ago









nanjunnanjun

14016




14016








  • 5





    There exists an environment for that: cases.

    – marmot
    7 hours ago














  • 5





    There exists an environment for that: cases.

    – marmot
    7 hours ago








5




5





There exists an environment for that: cases.

– marmot
7 hours ago





There exists an environment for that: cases.

– marmot
7 hours ago










2 Answers
2






active

oldest

votes


















4














as mentioned @marmot in comment, cases from amsmath is right toool for what you like obtain:



enter image description here



documentclass{IEEEtran}

usepackage{amsmath}



usepackage{lipsum}  % for dummy text



begin{document}

lipsum[1]

begin{equation}

theta_{pk} =

    begin{cases}

omega t+alpha+beta   & , n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta  & , n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

lipsum[2-4]

end{document}





share|improve this answer
























  • Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

    – nanjun
    6 hours ago






  • 1





    Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

    – manooooh
    6 hours ago











  • @manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

    – barbara beeton
    41 mins ago



















1














A variant, with the fleqn environment from nccmath. I improvedged the alignment in the first column of the cases environment, using a phantom — sign in the first row.



You also can save some space – to a certain extent, with the mathrlap command from mathtools (which loads amsmath). I didn't need it here.



documentclass{IEEEtran}

usepackage{amsmath, nccmath}



usepackage{lipsum} % for dummy text



begin{document}



lipsum[1]

begin{fleqn}

begin{equation}

theta_{pk} =

    begin{cases}

phantom{-}omega t+alpha+beta, & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta, & n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

end{fleqn}

lipsum[2-4]



end{document}


enter image description here






share|improve this answer
























  • What's the purpose of fleqn? I see no reason for it.

    – egreg
    6 hours ago











  • @egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

    – Bernard
    5 hours ago














Your Answer








StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "85"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f485658%2fhow-to-save-space-when-writing-equations-with-cases%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes









4














as mentioned @marmot in comment, cases from amsmath is right toool for what you like obtain:



enter image description here



documentclass{IEEEtran}

usepackage{amsmath}



usepackage{lipsum}  % for dummy text



begin{document}

lipsum[1]

begin{equation}

theta_{pk} =

    begin{cases}

omega t+alpha+beta   & , n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta  & , n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

lipsum[2-4]

end{document}





share|improve this answer
























  • Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

    – nanjun
    6 hours ago






  • 1





    Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

    – manooooh
    6 hours ago











  • @manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

    – barbara beeton
    41 mins ago
















4














as mentioned @marmot in comment, cases from amsmath is right toool for what you like obtain:



enter image description here



documentclass{IEEEtran}

usepackage{amsmath}



usepackage{lipsum}  % for dummy text



begin{document}

lipsum[1]

begin{equation}

theta_{pk} =

    begin{cases}

omega t+alpha+beta   & , n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta  & , n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

lipsum[2-4]

end{document}





share|improve this answer
























  • Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

    – nanjun
    6 hours ago






  • 1





    Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

    – manooooh
    6 hours ago











  • @manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

    – barbara beeton
    41 mins ago














4












4








4







as mentioned @marmot in comment, cases from amsmath is right toool for what you like obtain:



enter image description here



documentclass{IEEEtran}

usepackage{amsmath}



usepackage{lipsum}  % for dummy text



begin{document}

lipsum[1]

begin{equation}

theta_{pk} =

    begin{cases}

omega t+alpha+beta   & , n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta  & , n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

lipsum[2-4]

end{document}





share|improve this answer













as mentioned @marmot in comment, cases from amsmath is right toool for what you like obtain:



enter image description here



documentclass{IEEEtran}

usepackage{amsmath}



usepackage{lipsum}  % for dummy text



begin{document}

lipsum[1]

begin{equation}

theta_{pk} =

    begin{cases}

omega t+alpha+beta   & , n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta  & , n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

lipsum[2-4]

end{document}






share|improve this answer












share|improve this answer



share|improve this answer










answered 6 hours ago









ZarkoZarko

130k869169




130k869169













  • Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

    – nanjun
    6 hours ago






  • 1





    Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

    – manooooh
    6 hours ago











  • @manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

    – barbara beeton
    41 mins ago



















  • Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

    – nanjun
    6 hours ago






  • 1





    Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

    – manooooh
    6 hours ago











  • @manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

    – barbara beeton
    41 mins ago

















Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

– nanjun
6 hours ago





Is it possible to reduce the space before the commas if I have slightly longer equations to fit in the column?

– nanjun
6 hours ago




1




1





Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

– manooooh
6 hours ago





Great answer!! According to AMS, I think that the commas have to start just after the expression e.g. omega t+alpha+beta, and not omega t+alpha+beta&,, and at the end of the line should be a comma e.g. ldots,.

– manooooh
6 hours ago













@manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

– barbara beeton
41 mins ago





@manooooh -- "According to AMS ... have to" is a bit of a stretch. The traditional location of the commas is indeed at the end of the initial segment of a line, not after the &. That is what is shown in the user guide (texdoc amsldoc).

– barbara beeton
41 mins ago











1














A variant, with the fleqn environment from nccmath. I improvedged the alignment in the first column of the cases environment, using a phantom — sign in the first row.



You also can save some space – to a certain extent, with the mathrlap command from mathtools (which loads amsmath). I didn't need it here.



documentclass{IEEEtran}

usepackage{amsmath, nccmath}



usepackage{lipsum} % for dummy text



begin{document}



lipsum[1]

begin{fleqn}

begin{equation}

theta_{pk} =

    begin{cases}

phantom{-}omega t+alpha+beta, & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta, & n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

end{fleqn}

lipsum[2-4]



end{document}


enter image description here






share|improve this answer
























  • What's the purpose of fleqn? I see no reason for it.

    – egreg
    6 hours ago











  • @egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

    – Bernard
    5 hours ago


















1














A variant, with the fleqn environment from nccmath. I improvedged the alignment in the first column of the cases environment, using a phantom — sign in the first row.



You also can save some space – to a certain extent, with the mathrlap command from mathtools (which loads amsmath). I didn't need it here.



documentclass{IEEEtran}

usepackage{amsmath, nccmath}



usepackage{lipsum} % for dummy text



begin{document}



lipsum[1]

begin{fleqn}

begin{equation}

theta_{pk} =

    begin{cases}

phantom{-}omega t+alpha+beta, & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta, & n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

end{fleqn}

lipsum[2-4]



end{document}


enter image description here






share|improve this answer
























  • What's the purpose of fleqn? I see no reason for it.

    – egreg
    6 hours ago











  • @egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

    – Bernard
    5 hours ago
















1












1








1







A variant, with the fleqn environment from nccmath. I improvedged the alignment in the first column of the cases environment, using a phantom — sign in the first row.



You also can save some space – to a certain extent, with the mathrlap command from mathtools (which loads amsmath). I didn't need it here.



documentclass{IEEEtran}

usepackage{amsmath, nccmath}



usepackage{lipsum} % for dummy text



begin{document}



lipsum[1]

begin{fleqn}

begin{equation}

theta_{pk} =

    begin{cases}

phantom{-}omega t+alpha+beta, & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta, & n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

end{fleqn}

lipsum[2-4]



end{document}


enter image description here






share|improve this answer













A variant, with the fleqn environment from nccmath. I improvedged the alignment in the first column of the cases environment, using a phantom — sign in the first row.



You also can save some space – to a certain extent, with the mathrlap command from mathtools (which loads amsmath). I didn't need it here.



documentclass{IEEEtran}

usepackage{amsmath, nccmath}



usepackage{lipsum} % for dummy text



begin{document}



lipsum[1]

begin{fleqn}

begin{equation}

theta_{pk} =

    begin{cases}

phantom{-}omega t+alpha+beta, & n=1,2,3,4,5,6,ldots\

-omega t-alpha-beta, & n=7,8,9,10,11,12,ldots

    end{cases}

end{equation}

end{fleqn}

lipsum[2-4]



end{document}


enter image description here







share|improve this answer












share|improve this answer



share|improve this answer










answered 6 hours ago









BernardBernard

176k778210




176k778210













  • What's the purpose of fleqn? I see no reason for it.

    – egreg
    6 hours ago











  • @egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

    – Bernard
    5 hours ago





















  • What's the purpose of fleqn? I see no reason for it.

    – egreg
    6 hours ago











  • @egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

    – Bernard
    5 hours ago



















What's the purpose of fleqn? I see no reason for it.

– egreg
6 hours ago





What's the purpose of fleqn? I see no reason for it.

– egreg
6 hours ago













@egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

– Bernard
5 hours ago







@egreg: Inside this environment, the equations are flushleft, while being aligned, gathered, &c. This can save some space.

– Bernard
5 hours ago




















draft saved

draft discarded




















































Thanks for contributing an answer to TeX - LaTeX Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid …



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f485658%2fhow-to-save-space-when-writing-equations-with-cases%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







-

Popular posts from this blog

What other Star Trek series did the main TNG cast show up in?

Image
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0; } 4 I'm referring to Picard, Riker, Data, Worf, Geordi, Dr. Crusher, Wesley Crusher, Chief O'Brien and family, Deanna Troi, Guinan. I know Picard and Worf show up on DS9, though I haven't seen it myself. I'm curious what happened to the characters after that last episode of TNG? star-trek star-trek-tng share | improve this question edited 10 hours ago Ham Sandwich 6,051 2 25 75 ...
Read more

Berlina muro

Image
La berlina muro ĉe Bethaniendamm, 1986 La berlina muro aŭ simple la muro [1] , nomita ankaŭ "kontraŭfaŝisma remparo" en propaganda lingvo de la iama Germana Demokratia Respubliko, estis parto de la interngermana limo, kiu dividis de la 13-a de aŭgusto 1961 ĝis la 9-a de novembro 1989 okcidentan Berlinon de la orienta parto de la urbo kaj de la ĉirkaŭa tereno de la GDR. Ĝi estis unu el la plej famaj simboloj de la malvarma milito kaj de la disdivido de Germanio. Pli ol simpla muro, la berlina muro estis fakte tuta defendokonstruaĵo kun du muroj, ena malplena strio, rondirvojo, gardturoj kaj alarmsistemoj. Dum la provo transiri la severe garditan limon al okcidenta Berlino multaj homoj estis mortigitaj. La preciza nombro de viktimoj estas pridisputita kaj ne certa; la nombroj anoncataj varias inter 86 kaj 238 mortintoj. La malplifortiĝo de Sovetunio kaj la politiko de liberigo gvidita de Miĥail Gorbaĉov ebligis al la orientgermanoj faligi la 9-an de novembro 1989 l...
Read more

Berlina aerponto

Image
Flugkoridoroj dum la blokado de Berlino La Berlina aerponto estas la provizigo de okcidenta Berlino per aviadiloj fare de la aliancanoj inter la 23-a de junio 1948 kaj la 12-a de majo 1949 dum la blokado de Berlino fare de la sovetia armeo. Enhavo 1 Historio 1.1 La aerkoridoroj 1.2 Unuaj flugoj 1.3 Plibonigo de la aerponto 1.4 Fino de la aerponto 1.5 Rozinbombiloj 1.6 Bilanco 2 Flughavenoj 2.1 Berlino 2.2 Okcidenta Germanio 3 Aviadiloj de la berlina aerponto 4 15-a datreveno de la aerponto 5 Bibliografio 6 Referencoj 7 Eksteraj ligiloj Historio | General Lucius D. Clay, militguberniestro de la usona okupadzono Jam antaŭ la berlina aerponto estiĝis la malgranda aerponto . La estro de la sovetia militadministracio en Germanio, Vasili Daniloviĉ Sokolovski, ordonis la 1-an de aprilo 1948, kiel reago al la konferenco de Londono inter britoj, francoj kaj reprezentantoj de Benelukso pri aligo de Germa...
Read more