There is no required form for the records. 1  However, the records must include accurate information about the employee and data about the hours worked and the wages earned. The following is a listing of the basic payroll records that an employer must maintain:
Sometimes a conjecture is called a hypothesis when it is used frequently and repeatedly as an assumption in proofs of other results. For example, the Riemann hypothesis is a conjecture from number theory that (amongst other things) makes predictions about the distribution of prime numbers.
This alternative proof can be generalised to show that $\sqrt{n}$ is irrational when $n$ is not a square number. Proving something by contradiction can be a very nice method when it works, and there are many proofs in mathematics made easier or, indeed, possible by it.