Rigorous Definition and 154 Threads

Hi I'm looking for the mathematically rigorous definition of time ? can anyone help me ? Thanks Roger

Hi I hope someone can help me with this : I need the rigorous proof for 1+1 = 2 and explained in a fairly simple way. Thanks Roger

The SimCity navy has a rigorous training program. In order to graduate from the naval academy, cadets must enter a pool and fight sharks. Today, a group of cadets was tested. Each cadet put on his mask, snorkel, and two flippers; and armed himself with a knife. Then the cadets jumped into the...

I think I understand the formal/rigorous definition of limit, but I find proving various limits (or following proofs of them) extremely difficult. I hope you all will help me. I think I won't advance my calculus study until I really get this limit proving thing btw... Here's one limit prove...