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In mathematics, the error function (also called the Gauss error function) is a special function (non-elementary) of sigmoid shape that occurs in probability, statistics, and partial differential equations describing diffusion. It is defined as:
The complementary error function, denoted erfc, is defined as
which also defines erfcx, the scaled complementary error function (which can be used instead of erfc to avoid arithmetic underflow). Another form of is known as Craig's formula:
The imaginary error function, denoted erfi, is defined as
where D(x) is the Dawson function (which can be used...
Longest arithmetic subsequence
mathsequencenumberlist
Given a set/sequence* of integers, return a longest arithmetic sequence/subsequence*.
Meta/ *:
I am unsure whether I should ask for
creating a sequence from a set of integers that you can reorder arbitrarily (set not in the mathematica...
Find the longest run of true in a list of booleans. Return the same list, with all other trues falsified.
Input, output
A list; any usual format (e.g., a delimited list as a string).
Details
True and false can be anything your language typically uses for those values, or the integers 1 and 0....00:00 - 02:0002:00 - 04:0004:00 - 06:0006:00 - 13:0013:00 - 16:0016:00 - 17:0017:00 - 18:0018:00 - 20:0020:00 - 23:0023:00 - 00:00
