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Mar
29
comment Why is there a different button for 'minus' and 'negative' on a calculator?
This doesn't really answer the question. Although unary and binary minus are indeed distinct operations, a lot of programming languages, spreadsheet programs, etc., do manage to use the same symbol - for both of them.
Mar
29
awarded  Popular Question
Mar
29
comment Can a piece of A4 paper be folded so that it's thick enough to reach the moon?
Assuming a typical 0.1 mm thickness, how large would a sheet of paper need to be so that it could be folded 42 times?
Mar
28
comment Can a piece of A4 paper be folded so that it's thick enough to reach the moon?
1L << 42 is faster than calling a function ;-)
Mar
28
comment Can a piece of A4 paper be folded so that it's thick enough to reach the moon?
Just to verify, I measured a package of 500 sheets of paper, and it was about 5 cm thick. So, 0.1 mm per sheet is a good estimate.
Mar
28
comment Can a piece of A4 paper be folded so that it's thick enough to reach the moon?
A piece of A4 paper cut in half 42 consecutive times would be A46.
Mar
28
comment Why is the $O$ (zero) matrix important?
Do you understand why the number 0 is important?
Mar
28
answered Why do we limit the definition of a function?
Mar
21
awarded  Great Answer
Mar
21
awarded  Citizen Patrol
Mar
21
answered Is $\frac{0}{0}$ different from $\frac{1}{0}$?
Mar
20
answered What is the graph of $r \cos \theta = 3$?
Mar
20
answered What is the graph of the polar equation $r = e$?
Mar
8
comment What is exponentiation?
Related (almost a duplicate) question: math.stackexchange.com/questions/132703/…
Mar
8
comment Do we need to formally teach the Greek Alphabet?
You're not really “out of luck” if you don't know the key; you can just do a linear search through the dictionary's values until you find what you're looking for. Of course, this takes O(n) rather than O(1) time.
Feb
18
comment Fractional Power Interpretation
Duplicate of math.stackexchange.com/questions/132703/…
Feb
17
answered Exponential of $\bar{z} $
Feb
13
answered is there a formula for modulo
Feb
13
answered Perfect shuffle of 52 cards
Feb
13
answered How can you find the cubed roots of $i$?