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The first pic looks like a mug shot. “Proofreading the manuscript” is pretty funny. It seems a little odd that the cats’ names aren’t also included
That’s their names: first cat, second cat… He’s a math book author after all.
Meh, that’s nothing; J. H. Hetherington listed his cat, Chester, as a co-author on several papers (and even as the sole author of one of them).
Advanced rubber duck debugging
An especially judgy looking cat
He knows what you did.
The cat actually understands partial differential equations and therefore just judges the rest of us
Andy Field?