Since posting this morning, I think I have figured out how I worked my magic. I was indeed dividing zero by zero, although I did not realise it. The NUMLOCK was off, and I was attempting some division. Although the number keys weren’t working, the math function keys were. So I was effectively dividing zero by itself.

And thanks for your confidence in me, but I think there was never a chance of me becoming renown as a mathematical genious. I think “Liam’s Theorem” would end up being more like “Murphy’s Law”, much to Mr. Molnar’s chagrin.

It’s too bad you don’t recall the function, otherwise you could define it and become famous in math books everywhere for “Liam’s Theorem”. I am sure that would make Mr. Molnar proud. I know one way to get that message is to divide zero by zero, but I can’t figure out why you’d have typed that in to calculate, no matter how tired you were!