Hi . can you help me?

I can't draw it:

Attachment 23935

who can help me? thanks

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- May 22nd 2012, 11:28 PMvernaldiagram
Hi . can you help me?

I can't draw it:

Attachment 23935

who can help me? thanks - May 22nd 2012, 11:37 PMProve ItRe: diagram
If you need help with a question to do with this, you can just post the picture you've drawn.

Or do you need to know the LaTeX code for some other purpose? - May 23rd 2012, 01:36 AMvernalRe: diagram
- May 23rd 2012, 12:09 PMemakarovRe: diagram
This diagram is too complex for me to write it in full. You can start with the following TikZ code.

Code:`\usetikzlibrary{positioning,arrows}`

\begin{tikzpicture}[auto,>=stealth']

\node (N1) {$\llap{$\tilde e:{}$}N_1 \times N_r$};

\node[right=of N1] (L1) {$\tilde L$};

\node[above=of N1] (N) {$\llap{$e_r:{}$}N_r$};

\node[above=of L1] (L) {$L_r$};

\draw[->>] (N1) -- node[swap] {$\sigma_r$} (N);

\draw[->>] (L1) -- node[swap] {$\tau_r$} (L);

\draw[to reversed->] (N) -- node {$\chi_r$} (L);

\draw[to reversed->] (N1) -- (L1);

\path[use as bounding box] (-1.3,0) rectangle (0,0); % adds to the bounding box to include \tilde e: from node N1

\end{tikzpicture}

- May 23rd 2012, 10:48 PMvernalRe: diagram
thanks a lot my freind. now i underestand some thing.

but please say to me, how draw it:

Attachment 23939 - May 24th 2012, 05:41 AMemakarovRe: diagramCode:
`\usetikzlibrary{arrows,positioning}`

\begin{tikzpicture}[>=stealth',auto]

\node (top) {$\llap{$\tilde e:{}$}N_1\times N_2$};

\node[below=1.5cm of top] (mid) {$\llap{$e_1\times A:{}$}N_1\times A$};

\node[below=1.5cm of mid] (bot) {};

\draw[stealth' reversed->] (top) -- node {$\sigma$} (mid);

\draw[->>] (mid) -- node {$\mathsf{nat}'$} (bot);

\path (top) edge[->,dashed,bend right] (bot);

%or: \draw[->,dashed] (top) to[bend right] (bot);

\path[use as bounding box] (-2,0) -- (0,0);

\end{tikzpicture}