@Anush ...and it doesn't need to be even, (-1)^1 = -1 is real
@Anush if p itself is assumed to be real, you can imagine exponentiation of -1 as going around the unit circle of the complex plane. When p=0, you're at (1,0). When p=1, you've travelled half a circle to the opposite point: (-1,0). When p=1/2, that's the square root, i=sqrt(-1), at (0,1). It's easy to see that you only cross the real line (x) when p is an integer.
@Adám or the reciprocal of an odd integer - that depends... you're assuming -1^(1/3) is -1 as the cubic root of -1, but there are in fact 3 different cubic roots of -1 and the one that calculus considers as -1^(1/3) is a complex one
@Adám as I said in my comment above, that depends on the definition of -1^(1/3)
the question was "when is (-1)^p real?", so even though p=1/3 is indeed real, it's not a solution, because (-1)^p is not real (according to the calculus definition of exponentiation to a reciprocal)
Is there a faster way to force Windows Server to install all available updates than sconfig > 6 > a > a? It takes many minutes just to check for updates (!)
Where's Blackhat?
code-challenge test-battery image-processing
Challenge
Write code which, given an image of a panel from a random xkcd comic, returns 1 if blackhat is in the comic or 0 if not.
Who is Blackhat?
Blackhat is the unofficial name given to the character in xkcd comics who wears a...
say I have two arrays of integers(which I will call points) X and Y. I can define a measure of distance between X and Y as follows. We can insert a point into X, delete a point from X or move a point in to one in Y. Say the cost of moving a point is the distance you move it and everything else costs 1
you can work out the minimum distance between X and Y via a simplish dynamic programming solution
I've had worse form validation experiences. One of them ended with me ranting at every person at the support line until I was put through to the development lead and he confirmed the bug (and fixed it a few weeks later).
The Traveling Toothbrush
code-golf
SANDBOX: any other tags?
Introduction
Today's challenge is all about teeth. Specifically, how long it takes to brush from one tooth to another. Your challenge is, given the locations of two teeth, output the shortest amount of time possible to brush from the...
@dzaima Yeah, scopes are (will be) destroyed after the dfn/dop returns a value. Basically, every scope will correspond to either the main program, or a dfn/dop within the program. The scopes nest as well.
Where's Blackhat?
code-challenge test-battery image-processing
Challenge
Write code which, given an image of a panel from a random xkcd comic, returns 1 if blackhat is in the comic or 0 if not.
Who is Blackhat?
Blackhat is the unofficial name given to the character in xkcd comics who wears a...
The Traveling Toothbrush
code-golf
SANDBOX: any other tags?
Introduction
Today's challenge is all about teeth. Specifically, how long it takes to brush from one tooth to another. Your challenge is, given the locations of two teeth, output the shortest amount of time possible to brush from the...
