Diagram Chasing

This graph can be used to do interactive diagram chasing. In this example, use the graph to the right to prove the snake lemma.

How to Use

• Hold SHIFT and click to create an element of a module.
• Click and drag elements to map them forward.
• If an element maps to zero, you can pull it back. A new diagram chase will be created with the kernel of the pullback.
• Hold ALT (or OPTION) and drag to shift the position of the notation grid to improve readability.

Clear Diagram