10
votes
3answers
553 views

How to create vertical and horizontal dotted lines in a matrix?

Similar to this question, I am trying to output a similar matrix with dotted line instead of dashed line. Is there anyway to do this? I also try to use these three packages: ...
9
votes
2answers
212 views

Overline thickness

Is there a way in latex to change the vertical thickness (height) of the line generated by the \overline command? \[ \overline{\overline{A \vee B}} = \overline{\overline{A} \wedge \overline{B}} \]
3
votes
1answer
103 views

Proof package: lines too short

The proof package's \infer command automatically sizes the lines it draws. However, it isn't always right (pdflatex output): The line is too short on the left. Is this a package ...
8
votes
4answers
480 views

How to add partial horizontal lines in horizontally aligned math environments

I'm having trouble writing a proof of a theorem in LaTeX, where I need to sum a set of inequalities and continue the proof with this sum. The problem I have is that I'd like to introduce this step ...
12
votes
1answer
3k views

A Matrix with labels, dashed lines

I'm trying to TeX the following matrix, from Guillemin and Pollack (1.4 #13) The best I've been able to do is get the dashed lines with \[ \left( \begin{array}{c:c} B & C \\ \hdashline D ...
1
vote
1answer
311 views

Bold fraction line

I would like to use a "bold style" for the fraction line in a math formula. I've seen it in some PDFs, but I do not know the proper command.
13
votes
4answers
2k views

Draw a line through one column of a matrix

I'd like to "cancel" (draw a line through) a column of a matrix (using \begin{pmatrix}..\end{pmatrix}). How can I do this?
6
votes
2answers
14k views

How to draw a vertical line of desired length in equations.

I am writing a big formula where a vertical line is needed. Instead of $\vline$ or $|$, does anyone know a way to draw this vertical line of desired length? The formula is something like $$ E\Bigg[ ...