2 Attachment(s)

Exact Sequences - Diagrams that 'commute' - vertical arrows

I am reading Dummit and Foote on Exact Sequences and some of the 'diagrams that commute' have vertical arrows.

Can someone please help me with the LaTex for these diagrams.

I have given an example in the attachment "Exact Sequences - Diagrams with Vertical Arrows" - where I also frame my question (please see attachement)

I have also attached Dummit and Foote Section 10.5 page 381 which has two examples of the diagrams to which I refer.

Would be very grateful for help.

Peter

Re: Exact Sequences - Diagrams that 'commute' - vertical arrows

Hello, Bernhard!

Here's one way . . .

Code:

`\begin{array}{ccccccccc} &&& \alpha && \beta && \gamma \\`

O & \to & A & \to & B & \to & C & \to & O \\

&& \quad\downarrow \phi && \quad\downarrow\psi && \quad\downarrow\tau \\

O & \to & A' & \to & B' & \to & C' & \to & O \end{array}

Note: You may have to type all this in one continuous line.