I use \times and redefine it as \cdot
this post was submitted on 19 Jun 2024
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\cdotfor vectors and in some cases, scalar variables, e.g.,x \cdot y\timesfor numbers, e.g.,2 \times 8- nothing for combination and scalars, e.g.,
2xorxy
\cdot master race. \times users should just use Microsoft Word (unless it's for a Cartesian product or for cross product, of course)
\cdot for matrix multiplication and the dot product, \times for cross product and nothing (or *, if I want to write it explicitly and have no convolution in the expression) for regular multiplication.
** for power?
^ for power.
** is usually in a programming setting (but it‘s usually a method and not an operator there.)
or *, if I want to write it explicitly and have no convolution in the expression
But why
'*' is commonly used for multiplication in computer programming, so it's probably that. Also in your calculator app
This is the way
How about nothing at all
Aye, why not an asterisk / * ?
It's also good for multiplying, innit?
I need 'em both. Not everything I multiply is a number.
dot product vs cross product
People using the cross for scalar multiplication are insane
Get rotated, idiot.
I just downvoted your comment.
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I didn't actually downvoted your comment but apprently someone did and now I look like an asshole 😢.
Downvoted because it didn’t end with /s.
Honestly with a writeup like this I wouldn't be mad about it even if you did, this is excellent. I wish all my downvoted comments got this kind of attention.
It’s an old copypasta from reddit haha. I modified it to add the Fediverse stuff and my complaints with LaTex and improper rotation.
\cdot all the way (except e.g. cross-product for vectors, I'm not an anarchist)
Same same, cdot is nice and clear
cdots is within matrices and times is used for a m \times n matrix
\cdot for vector dot products, \times for multiplying plain numbers, whatever i feel like for anything else
edit: dropped the dot in vector dot product, my bad
Vector dot products go with dot, cross with times.
yeah i accidentally left that out
(1)(3)(5)
Fight me. Also, one of these is a function
Cries in Linear Algebra
times is for cartesian product, cdot if i feel like it
Depends on whether I want a scalar or vector, sine or cosine
I use asterisk.
In LaTeX? You really are a rebel.
As someone that grades undergraduates, I'm happy that they not use the letter "x" to imply multiplication.
I don’t understand why we teach that to children, just to turn around and tell them not to do it a few years later.
I suppose kids aren't great at centering a dot. But they could draw a six pointed * as easily as an x, it's one more line.
(