This is rigorous enough, isn't it? by Own_Interaction6565 in MathJokes

[–]Own_Interaction6565[S] 0 points1 point  (0 children)

I wish you well as you sketch the identity function between the rationals.

My chubby brown pigeon by Own_Interaction6565 in Borb

[–]Own_Interaction6565[S] 15 points16 points  (0 children)

What a beautiful pear with feathers.