Questions asked by Andrew I.
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What is the reverse gradient operation?

How do you prove that the square root of a number #S# can be approximated by using the recurrence relation:
#x_(n+1) = 1/2(x_n+S/x_n)# ?

I have noticed a bug formatting equations and was wondering if someone could help?

How do you prove: #lim_(x>0) sin(x)/x = 1# without using l'hopital's rule (or the derivative of sin(x) at all)?

How to place a normalization coefficient at the start of a function with braket notation?