I have this document:

\documentclass[a4paper,11pt, twocolumn]{article}

    f(\boldsymbol{y}|\boldsymbol{\alpha},\boldsymbol{\beta})&=\binom{m}{\boldsymbol{y}}\prod_{i=1}^{k-1}\frac{\Gamma(\alpha_i+y_i)}{\Gamma(\alpha_i)} \frac{\Gamma(\beta_i+\sum_{j=i}^ky_j)}{\Gamma(\beta_i)} \\
    &\qquad{} \times \frac{\Gamma(\alpha_i+\beta_i)}{\Gamma(\alpha_i+\beta_i+\sum_{j=i}^ky_j)}


The fact is that this equation goes into the right column even if I divide it into two lines... How can I solve this problem?


... or using a simple align, and replacing | with \mid,

enter image description here

\hrule % just to indicate width of column
f(\bm{y}&\mid\bm{\alpha},\bm{\beta})= \notag\\
&\binom{m}{\bm{y}} \prod_{i=1}^{k-1}
\frac{\Gamma(\beta_i+\sum_{j=i}^ky_j)}{\Gamma(\beta_i)} \notag\\
  • 1
    +1. I would replace the math-old | character with the math-rel macro \mid, though, – Mico May 10 at 16:01
  • 1
    Done. :-) (changed | to \mid, and \boldsymbol to \bm) – Mico May 10 at 16:19
  • 1
    Thank you very much... it seems to me that they have just changed the characters on the site: I now see these differents. They are similar to Calibri font. – Sebastiano May 10 at 16:30
  • 1
    Good eye! See We are switching to system fonts on May 10, 2021 for the full announcement. – Mico May 10 at 16:32
  • 1
    @Mico I have not see the link....and the advice...:-))) My eyes are very very tired...and I am here for relax. – Sebastiano May 10 at 16:33

I suggest using the multline environment instead:

\documentclass[a4paper,11pt, twocolumn]{article}


f(\boldsymbol{y}\mid\boldsymbol{\alpha},\boldsymbol{\beta}) = \\
\binom{m}{\boldsymbol{y}}\prod_{i=1}^{k-1}\frac{\Gamma(\alpha_i+y_i)}{\Gamma(\alpha_i)} \frac{\Gamma(\beta_i+\sum_{j=i}^ky_j)}{\Gamma(\beta_i)} \\
\times \frac{\Gamma(\alpha_i+\beta_i)}{\Gamma(\alpha_i+\beta_i+\sum_{j=i}^ky_j)}


enter image description here

  • Same comment about \mid that has already been mentioned. – barbara beeton May 10 at 18:31
  • @barbarabeeton: Yes, I had noticed that, but I thought it was not the main point here. I'll fix it anyway. – Bernard May 10 at 18:43

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.