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Options leqno, reqno for documentclass or exist another option?

aligning a multiline formula with the bullet of itemizeHow can I number a few equations togetherLeft aligning equations without align characterHow can I change the position of equation number locally if I am not using the amsmath package?List of equations, including equation contents and captionequation exceeds page width after changing document class from “article” to “beamer”Can't generate png with Error: Erroneous nesting of equation structuresHow continue a equation next lineAlign equations within one lineflalign, leqno and equations left aligned. Overlapping of equations and tags

1

I consider these simple MWE

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
 x^n + y^n = z^n
endequation
enddocument

With the option leqno we know that LaTeX puts the progressive number of the equation on the extreme left. With the option reqno at the extreme right of the page.

documentclass[12pt,reqno]article
usepackageamsmath
begindocument
beginequation
 E=mc^2
endequation
enddocument

But when I have, for example a code with align option, knowing that the number can be either on the first or second equation, how come the leqno option is not active and the number is always put on the right?

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginalign
a &= b+c nonumber\
e &= f+g
endalign
enddocument

1. How do I put the number of the equation between the two equations in the middle or at left or at right?


2. Are there only leqno and regno options with LaTeX? But is there, for example, the ceqno option, i.e. the possibility of placing the number next to the equation (at the centre to be clearer) or that it is always at the centre but in the middle of the two equations?

math-mode equations numbering align amsmath

share|improve this question

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  why do you say "how come the leqno option is not active and the number is always put on the right?" the equation number appears on the left when leqno is used.
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidCarlisle Why leqno is not active with align?
  
  – Sebastiano
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  it is active, you get the number on the left
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The code is in the question not the answer so I added the image for leqno to your answer, you only showed the default right number. (there is no regno option)
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidCarlisle I have deleted my previous comment after your edit.
  
  – Sebastiano
  2 hours ago
  

  
  
  
  

add a comment | 

1

I consider these simple MWE

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
 x^n + y^n = z^n
endequation
enddocument

With the option leqno we know that LaTeX puts the progressive number of the equation on the extreme left. With the option reqno at the extreme right of the page.

documentclass[12pt,reqno]article
usepackageamsmath
begindocument
beginequation
 E=mc^2
endequation
enddocument

But when I have, for example a code with align option, knowing that the number can be either on the first or second equation, how come the leqno option is not active and the number is always put on the right?

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginalign
a &= b+c nonumber\
e &= f+g
endalign
enddocument

1. How do I put the number of the equation between the two equations in the middle or at left or at right?


2. Are there only leqno and regno options with LaTeX? But is there, for example, the ceqno option, i.e. the possibility of placing the number next to the equation (at the centre to be clearer) or that it is always at the centre but in the middle of the two equations?

math-mode equations numbering align amsmath

share|improve this question

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  why do you say "how come the leqno option is not active and the number is always put on the right?" the equation number appears on the left when leqno is used.
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidCarlisle Why leqno is not active with align?
  
  – Sebastiano
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  it is active, you get the number on the left
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The code is in the question not the answer so I added the image for leqno to your answer, you only showed the default right number. (there is no regno option)
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidCarlisle I have deleted my previous comment after your edit.
  
  – Sebastiano
  2 hours ago
  

  
  
  
  

add a comment | 

I consider these simple MWE

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
 x^n + y^n = z^n
endequation
enddocument

With the option leqno we know that LaTeX puts the progressive number of the equation on the extreme left. With the option reqno at the extreme right of the page.

documentclass[12pt,reqno]article
usepackageamsmath
begindocument
beginequation
 E=mc^2
endequation
enddocument

But when I have, for example a code with align option, knowing that the number can be either on the first or second equation, how come the leqno option is not active and the number is always put on the right?

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginalign
a &= b+c nonumber\
e &= f+g
endalign
enddocument

1. How do I put the number of the equation between the two equations in the middle or at left or at right?


2. Are there only leqno and regno options with LaTeX? But is there, for example, the ceqno option, i.e. the possibility of placing the number next to the equation (at the centre to be clearer) or that it is always at the centre but in the middle of the two equations?

math-mode equations numbering align amsmath

share|improve this question

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
 x^n + y^n = z^n
endequation
enddocument

documentclass[12pt,reqno]article
usepackageamsmath
begindocument
beginequation
 E=mc^2
endequation
enddocument

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginalign
a &= b+c nonumber\
e &= f+g
endalign
enddocument

share|improve this question

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

share|improve this question

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

edited 2 hours ago

David Carlisle

502k4211491897

edited 2 hours ago

David Carlisle

502k4211491897

asked 2 hours ago

SebastianoSebastiano

11.8k42467

asked 2 hours ago

SebastianoSebastiano

11.8k42467

1 Answer
1

active

oldest

votes

4

If you want a single number for the display, use equation not align

Note that there is no reqno option, equation numbers on the right is the default.

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
beginsplit
a &= b+c \
e &= f+g
endsplit
endequation
enddocument

share|improve this answer

edited 2 hours ago

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But can the number (1) be placed closer to the two equations always in the middle?
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano equation numbers are always placed at the margin
  
  – David Carlisle
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano if you really wanted to change the margins you could use a minipage for example
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I asked myself this question when I remember seeing a book of Physics in English that had the number of formulas nearby.
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you surround the display with say beginminipage.5textwidth then the number is only moved half way across the page (although using a minipage has other issues) @Sebastiano
  
  – David Carlisle
  1 hour ago
  

  
  
  
  

 | 
show 2 more comments

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4

If you want a single number for the display, use equation not align

Note that there is no reqno option, equation numbers on the right is the default.

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
beginsplit
a &= b+c \
e &= f+g
endsplit
endequation
enddocument

share|improve this answer

edited 2 hours ago

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But can the number (1) be placed closer to the two equations always in the middle?
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano equation numbers are always placed at the margin
  
  – David Carlisle
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano if you really wanted to change the margins you could use a minipage for example
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I asked myself this question when I remember seeing a book of Physics in English that had the number of formulas nearby.
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you surround the display with say beginminipage.5textwidth then the number is only moved half way across the page (although using a minipage has other issues) @Sebastiano
  
  – David Carlisle
  1 hour ago
  

  
  
  
  

 | 
show 2 more comments

4

If you want a single number for the display, use equation not align

Note that there is no reqno option, equation numbers on the right is the default.

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
beginsplit
a &= b+c \
e &= f+g
endsplit
endequation
enddocument

share|improve this answer

edited 2 hours ago

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But can the number (1) be placed closer to the two equations always in the middle?
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano equation numbers are always placed at the margin
  
  – David Carlisle
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Sebastiano if you really wanted to change the margins you could use a minipage for example
  
  – David Carlisle
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I asked myself this question when I remember seeing a book of Physics in English that had the number of formulas nearby.
  
  – Sebastiano
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you surround the display with say beginminipage.5textwidth then the number is only moved half way across the page (although using a minipage has other issues) @Sebastiano
  
  – David Carlisle
  1 hour ago
  

  
  
  
  

 | 
show 2 more comments

If you want a single number for the display, use equation not align

Note that there is no reqno option, equation numbers on the right is the default.

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
beginsplit
a &= b+c \
e &= f+g
endsplit
endequation
enddocument

share|improve this answer

edited 2 hours ago

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

documentclass[12pt,leqno]article
usepackageamsmath
begindocument
beginequation
beginsplit
a &= b+c \
e &= f+g
endsplit
endequation
enddocument

share|improve this answer

edited 2 hours ago

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897

answered 2 hours ago

David CarlisleDavid Carlisle

502k4211491897