Here, taken at various times, are pictures showing five different cats reviewing, helping me with, and generally disapproving of my algebraic efforts involving celestial mechanics.

Here is our beloved Fred (RIP, 2004), checking a blank page for algebraic suitability. He's a little near-sighted. Got to have the right kind of paper if you want to be brilliant!

Fred renders his opinion in typical cat fashion.

Suki keeps an eye on progress. She makes me nervous, and I make a mistake.

Suki spots a potential problem.

Definitely not happy about that last result, which leaves a bad taste in her mouth.

Frank's mind is wandering a bit. He falls asleep in seminars.

"Ah, now this, over here, is interesting!"

Spike, our Zen cat, says he's not convinced...

Sudden interest. "You might have something here."

"Better check the derivation of that..."

"No, no, it's on the other page. Silly human. I'll wait."

Keiko, our Master Algebraist, stops by to check.

I wait patiently as she investigates an early argument...

...and moves on to the next page...

...and the next...(working through somebody else's math can take a long time)

Okay, she's finally absorbed all the background calculations and is checking my brilliant conclusions...

Disaster! An error so egregious she busts out laughing! I am humiliated!