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How to write cases in LaTeX?

Capital Sigma in bold mathrmUndefined control sequence error for sum expression in equationEquation: How to create nested/multiple cases in LaTeX to align the qualifiersHow to break a line in a long equation?mathpazo package and changing font within begin{equation} … end{equation}Cases with long text at the end.How to place a sim over equiv similar to simeq and cong?Itemize with cases in beamerHow to align two begin{equation}begin{cases}?Parenthesis vertically misaligned in “cases” environment

6

I want to write following system of equation in my paper, but I don't know how:

Here is a code that I've tried, but it does not work:

Rgeqslant R_t equiv begin{cases} frac{r_{t+1} (1-W(k_t)}{f'(k{t+1}    

lambda} &mbox{if } k_t < K(lambda) \ 

frac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases} 

Any suggestions will be very helpful. Thanks

math-mode cases

share|improve this question

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Excuse me but the code is different from the image. Have I understood well?
  
  – Sebastiano
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Consider accepting one of the provided answers if your question is solved (check mark on the left hand side of the answers).
  
  – Dr. Manuel Kuehner
  7 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't understand what you were having trouble with. The only error I got compiling was about geqslant. What about didn't work? Or were you wanting to get something closer to your image than you have? I would say that your code gives a better output than that image.
  
  – Teepeemm
  4 hours ago
  

  
  
  
  

add a comment | 

6

I want to write following system of equation in my paper, but I don't know how:

Here is a code that I've tried, but it does not work:

Rgeqslant R_t equiv begin{cases} frac{r_{t+1} (1-W(k_t)}{f'(k{t+1}    

lambda} &mbox{if } k_t < K(lambda) \ 

frac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases} 

Any suggestions will be very helpful. Thanks

math-mode cases

share|improve this question

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Excuse me but the code is different from the image. Have I understood well?
  
  – Sebastiano
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Consider accepting one of the provided answers if your question is solved (check mark on the left hand side of the answers).
  
  – Dr. Manuel Kuehner
  7 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't understand what you were having trouble with. The only error I got compiling was about geqslant. What about didn't work? Or were you wanting to get something closer to your image than you have? I would say that your code gives a better output than that image.
  
  – Teepeemm
  4 hours ago
  

  
  
  
  

add a comment | 

I want to write following system of equation in my paper, but I don't know how:

Here is a code that I've tried, but it does not work:

Rgeqslant R_t equiv begin{cases} frac{r_{t+1} (1-W(k_t)}{f'(k{t+1}    

lambda} &mbox{if } k_t < K(lambda) \ 

frac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases} 

Any suggestions will be very helpful. Thanks

math-mode cases

share|improve this question

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Rgeqslant R_t equiv begin{cases} frac{r_{t+1} (1-W(k_t)}{f'(k{t+1}    

lambda} &mbox{if } k_t < K(lambda) \ 

frac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases} 

share|improve this question

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 7 hours ago

siracusa

5,04011429

edited 7 hours ago

siracusa

5,04011429

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

New contributor

Nurzada Diushalieva is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 7 hours ago

Nurzada DiushalievaNurzada Diushalieva

311

2 Answers
2

active

oldest

votes

10

I would load the mathtools package, which is a superset of the amsmath package, and employ that package's dcases* environment.

documentclass{article}

usepackage{mathtools} % for 'dcases*' env.

begin{document}

[

Rge R_t equiv

begin{dcases*}

frac{r_{t+1}}{f'(k_{t+1})}frac{1-W(k_t)}{lambda} 

   & if  $k_t < K(lambda)$,, \[1ex]

frac{r_{t+1}}{f'(k_{t+1})} 

   & if $k_tge K(lambda)$,.

end{dcases*}

]

end{document}

share|improve this answer

answered 7 hours ago

MicoMico

280k31383772

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this command better than the usual cases command?
  
  – knzhou
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @knzhou - I wouldn't say that dcases is necessarily better than cases, certainly not in the sense of it being *always and everywhere" better than cases. The d in dcases denotes "automatic display-style math mode. It's handy if one has to typeset expressions such as frac, which might look a whole lot better when rendered in display-style math mode rather than in text-style math mode. Conversely, cases is much more parsimonious, space-wise, than dcases. If conserving space is an important criterion, by all means go with cases.
  
  – Mico
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Makes sense, thanks! I was just asking in case cases had been declared obsolete by people in the know for some reason, like how [ ... ] is supposed to be strictly better than $$ ... $$.
  
  – knzhou
  4 hours ago
  

  
  
  
  

add a comment | 

3

Welcome to TeX.SE. Here my (fast) proposal from your original code:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}



begin{document}

[Rgeqslant R_t equiv begin{cases} dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1}    

lambda)} &mbox{if } k_t < K(lambda) \

&\

dfrac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases}] 

end{document}

EDIT: By correct comment of @Yorgos:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}

begin{document}

[

Rgeqslant R_t equiv 

begin{cases} 

dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1} lambda)} 

    & text{if } k_t < K(lambda) \

&\  % blank row

dfrac{r_{t+1}}{f'(k_{t+1})} 

    & text{if } k_tgeqslant K(lambda) 

end{cases}

] 

end{document}

share|improve this answer

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i don't think that mbox is necessary, since & aligns. also i prefer equation environment, since it allows for numbering the equation
  
  – Yorgos
  7 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Yorgos I accept your suggestion correctly. I have only taken the code from the user. :(
  
  – Sebastiano
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Sebastiano Thanks a lot :)
  
  – Nurzada Diushalieva
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I believe that the k{t+1} term in the first denominator should be changed to k_{t+1}.
  
  – Mico
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Mico Thank you very much for edit and all ....You're right for you comment.
  
  – Sebastiano
  5 hours ago
  

  
  
  
  

add a comment | 

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10

I would load the mathtools package, which is a superset of the amsmath package, and employ that package's dcases* environment.

documentclass{article}

usepackage{mathtools} % for 'dcases*' env.

begin{document}

[

Rge R_t equiv

begin{dcases*}

frac{r_{t+1}}{f'(k_{t+1})}frac{1-W(k_t)}{lambda} 

   & if  $k_t < K(lambda)$,, \[1ex]

frac{r_{t+1}}{f'(k_{t+1})} 

   & if $k_tge K(lambda)$,.

end{dcases*}

]

end{document}

share|improve this answer

answered 7 hours ago

MicoMico

280k31383772

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this command better than the usual cases command?
  
  – knzhou
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @knzhou - I wouldn't say that dcases is necessarily better than cases, certainly not in the sense of it being *always and everywhere" better than cases. The d in dcases denotes "automatic display-style math mode. It's handy if one has to typeset expressions such as frac, which might look a whole lot better when rendered in display-style math mode rather than in text-style math mode. Conversely, cases is much more parsimonious, space-wise, than dcases. If conserving space is an important criterion, by all means go with cases.
  
  – Mico
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Makes sense, thanks! I was just asking in case cases had been declared obsolete by people in the know for some reason, like how [ ... ] is supposed to be strictly better than $$ ... $$.
  
  – knzhou
  4 hours ago
  

  
  
  
  

add a comment | 

10

I would load the mathtools package, which is a superset of the amsmath package, and employ that package's dcases* environment.

documentclass{article}

usepackage{mathtools} % for 'dcases*' env.

begin{document}

[

Rge R_t equiv

begin{dcases*}

frac{r_{t+1}}{f'(k_{t+1})}frac{1-W(k_t)}{lambda} 

   & if  $k_t < K(lambda)$,, \[1ex]

frac{r_{t+1}}{f'(k_{t+1})} 

   & if $k_tge K(lambda)$,.

end{dcases*}

]

end{document}

share|improve this answer

answered 7 hours ago

MicoMico

280k31383772

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this command better than the usual cases command?
  
  – knzhou
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @knzhou - I wouldn't say that dcases is necessarily better than cases, certainly not in the sense of it being *always and everywhere" better than cases. The d in dcases denotes "automatic display-style math mode. It's handy if one has to typeset expressions such as frac, which might look a whole lot better when rendered in display-style math mode rather than in text-style math mode. Conversely, cases is much more parsimonious, space-wise, than dcases. If conserving space is an important criterion, by all means go with cases.
  
  – Mico
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Makes sense, thanks! I was just asking in case cases had been declared obsolete by people in the know for some reason, like how [ ... ] is supposed to be strictly better than $$ ... $$.
  
  – knzhou
  4 hours ago
  

  
  
  
  

add a comment | 

I would load the mathtools package, which is a superset of the amsmath package, and employ that package's dcases* environment.

documentclass{article}

usepackage{mathtools} % for 'dcases*' env.

begin{document}

[

Rge R_t equiv

begin{dcases*}

frac{r_{t+1}}{f'(k_{t+1})}frac{1-W(k_t)}{lambda} 

   & if  $k_t < K(lambda)$,, \[1ex]

frac{r_{t+1}}{f'(k_{t+1})} 

   & if $k_tge K(lambda)$,.

end{dcases*}

]

end{document}

share|improve this answer

answered 7 hours ago

MicoMico

280k31383772

documentclass{article}

usepackage{mathtools} % for 'dcases*' env.

begin{document}

[

Rge R_t equiv

begin{dcases*}

frac{r_{t+1}}{f'(k_{t+1})}frac{1-W(k_t)}{lambda} 

   & if  $k_t < K(lambda)$,, \[1ex]

frac{r_{t+1}}{f'(k_{t+1})} 

   & if $k_tge K(lambda)$,.

end{dcases*}

]

end{document}

share|improve this answer

answered 7 hours ago

MicoMico

280k31383772

answered 7 hours ago

MicoMico

280k31383772

answered 7 hours ago

MicoMico

280k31383772

3

Welcome to TeX.SE. Here my (fast) proposal from your original code:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}



begin{document}

[Rgeqslant R_t equiv begin{cases} dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1}    

lambda)} &mbox{if } k_t < K(lambda) \

&\

dfrac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases}] 

end{document}

EDIT: By correct comment of @Yorgos:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}

begin{document}

[

Rgeqslant R_t equiv 

begin{cases} 

dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1} lambda)} 

    & text{if } k_t < K(lambda) \

&\  % blank row

dfrac{r_{t+1}}{f'(k_{t+1})} 

    & text{if } k_tgeqslant K(lambda) 

end{cases}

] 

end{document}

share|improve this answer

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i don't think that mbox is necessary, since & aligns. also i prefer equation environment, since it allows for numbering the equation
  
  – Yorgos
  7 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Yorgos I accept your suggestion correctly. I have only taken the code from the user. :(
  
  – Sebastiano
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Sebastiano Thanks a lot :)
  
  – Nurzada Diushalieva
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I believe that the k{t+1} term in the first denominator should be changed to k_{t+1}.
  
  – Mico
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Mico Thank you very much for edit and all ....You're right for you comment.
  
  – Sebastiano
  5 hours ago
  

  
  
  
  

add a comment | 

3

Welcome to TeX.SE. Here my (fast) proposal from your original code:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}



begin{document}

[Rgeqslant R_t equiv begin{cases} dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1}    

lambda)} &mbox{if } k_t < K(lambda) \

&\

dfrac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases}] 

end{document}

EDIT: By correct comment of @Yorgos:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}

begin{document}

[

Rgeqslant R_t equiv 

begin{cases} 

dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1} lambda)} 

    & text{if } k_t < K(lambda) \

&\  % blank row

dfrac{r_{t+1}}{f'(k_{t+1})} 

    & text{if } k_tgeqslant K(lambda) 

end{cases}

] 

end{document}

share|improve this answer

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i don't think that mbox is necessary, since & aligns. also i prefer equation environment, since it allows for numbering the equation
  
  – Yorgos
  7 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Yorgos I accept your suggestion correctly. I have only taken the code from the user. :(
  
  – Sebastiano
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Sebastiano Thanks a lot :)
  
  – Nurzada Diushalieva
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I believe that the k{t+1} term in the first denominator should be changed to k_{t+1}.
  
  – Mico
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Mico Thank you very much for edit and all ....You're right for you comment.
  
  – Sebastiano
  5 hours ago
  

  
  
  
  

add a comment | 

Welcome to TeX.SE. Here my (fast) proposal from your original code:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}



begin{document}

[Rgeqslant R_t equiv begin{cases} dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1}    

lambda)} &mbox{if } k_t < K(lambda) \

&\

dfrac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases}] 

end{document}

EDIT: By correct comment of @Yorgos:

documentclass[12pt]{article}

usepackage{amsmath,amssymb}

begin{document}

[

Rgeqslant R_t equiv 

begin{cases} 

dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1} lambda)} 

    & text{if } k_t < K(lambda) \

&\  % blank row

dfrac{r_{t+1}}{f'(k_{t+1})} 

    & text{if } k_tgeqslant K(lambda) 

end{cases}

] 

end{document}

share|improve this answer

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

documentclass[12pt]{article}

usepackage{amsmath,amssymb}



begin{document}

[Rgeqslant R_t equiv begin{cases} dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1}    

lambda)} &mbox{if } k_t < K(lambda) \

&\

dfrac{r_{t+1}}{f'(k_{t+1})} & mbox{if } k_tgeqslant K(lambda) 

end{cases}] 

end{document}

documentclass[12pt]{article}

usepackage{amsmath,amssymb}

begin{document}

[

Rgeqslant R_t equiv 

begin{cases} 

dfrac{r_{t+1} (1-W(k_t))}{f'(k{t+1} lambda)} 

    & text{if } k_t < K(lambda) \

&\  % blank row

dfrac{r_{t+1}}{f'(k_{t+1})} 

    & text{if } k_tgeqslant K(lambda) 

end{cases}

] 

end{document}

share|improve this answer

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

edited 7 hours ago

Mico

280k31383772

edited 7 hours ago

Mico

280k31383772

answered 7 hours ago

SebastianoSebastiano

10.2k41960

answered 7 hours ago

SebastianoSebastiano

10.2k41960