youtor.org
How to count ONTO functions
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=hk8GAVYU8Kc
This is my lengthy and super detailed explanation as to where the equation to compute the total number of onto functions comes from. • Table of Contents • • 0:00 Understanding the question • • 0:13 Definitions • • 2:56 Finding a strategy • • 7:12 Not mapping 1 element • • 15:43 Not mapping 2 elements • • 18:07 Accounting for Combinations • • 21:46 Overcounting • • 29:25 Putting it all together • • 29:46 Why the sum goes to b • • 31:10 The formula
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