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General community for all things mathematics on @lemmy.world

Submit link and text posts about anything at all related to mathematics.

Questions about mathematical topics are allowed, but NO HOMEWORK HELP. Communities for general math and homework help should be firmly delineated just as they were on reddit.

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Random internet people explaining math better then math teacher (i.imgur.com)

submitted 1 year ago by [email protected] to c/[email protected]

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[–] [email protected] 5 points 1 year ago* (last edited 1 year ago) (1 children)

Actually programs are much less readable than corresponding math representation. Even in a simpler example of a for loop. Code is known to quickly add cognitive complexity, while math language manage to keep complexity understandable.

Have you tried reading how a matrix matrix multiplication is implemented with for loops? Compare it with the mathematical representation to see what I mean

Success of fortran, mathematica, R numpy, pandas and even functional programming is because they are built to make programming closer to the simplicity of math

[–] [email protected] 1 points 1 year ago (1 children)

Will I think there’s a danger here to conflate abstraction with mathematical notation. Code, whether Fortran, C or numpy, is capable of abstraction just as mathematics is. Abstraction can help bring complexity under control. But what happens when you need to understand that complexity because you haven’t learnt it yet?

Now sure writing a program that will actually work and perform well adds an extra cognitive load. But I’m talking more about procedural pseudo code being written for the purposes of explaining to toss who don’t already understand.

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

Math is the language developed exactly for that, to be an unambiguous, standard way to represent extremely complex, abstract concepts.

In the example above, both the summation and the for loop are simply

a_1 + a_2 + ... + a_n

Math is the language to explain, programming languages is to implement it in a way that can be done by computers. In a real case scenario is more often

sum(x)

x.sum()

as a for loop is less readable (and often unoptimized).

If someone doesn't know math he can do the same as those who don't know programming: learn it.

Learning barrier of math is actually lower than programming