This is a general page to help show people how to make proofs. Please add to this page, so that others will have an idea of good proof techniques.
For now take a look at this page.
To discuss it in more detail, feel free to use the talk page.
When this page/section has been completed, {{Stub}} should be removed from the code.
If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page (see the proofread template for usage).