\cdot all the way (except e.g. cross-product for vectors, I’m not an anarchist)
Which side are you on?
Submitted 5 months ago by FlapKap@feddit.dk to science_memes@mander.xyz
https://feddit.dk/pictrs/image/b14543e7-7108-427a-b10d-9e811b5c9a81.webp
Comments
NeatNit@discuss.tchncs.de 5 months ago
RubberElectrons@lemmy.world 5 months ago
Same same, cdot is nice and clear
rescue_toaster@lemm.ee 5 months ago
As someone that grades undergraduates, I’m happy that they not use the letter “x” to imply multiplication.
credo@lemmy.world 5 months ago
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.
davidgro@lemmy.world 5 months ago
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.
tate@lemmy.sdf.org 5 months ago
I need 'em both. Not everything I multiply is a number.
anothercatgirl@lemmy.blahaj.zone 5 months ago
dot product vs cross product
IAmVeraGoodAtThis@lemmy.blahaj.zone 5 months ago
(1)(3)(5)
Fight me
anothercatgirl@lemmy.blahaj.zone 5 months ago
I use asterisk.
tate@lemmy.sdf.org 5 months ago
In LaTeX? You really are a rebel.
AeonFelis@lemmy.world 5 months ago
\cdot
master race.\times
users should just use Microsoft Word (unless it’s for a Cartesian product or for cross product, of course)Kruemel@feddit.de 5 months ago
times is for cartesian product, cdot if i’m feeling it
the_beber@lemm.ee 5 months ago
\cdot
for matrix multiplication and the dot product,\times
for cross product and nothing (or*
, if I want to write it explicitly) for regular multiplication.MBM@lemmings.world 5 months ago
or *, if I want to write it explicitly and have no convolution in the expression
But why
thatsTheCatch@lemmy.nz 5 months ago
- is commonly used for multiplication in computer programming, so it’s probably that. Also in your calculator app
NegativeInf@lemmy.world 5 months ago
** for power?
the_beber@lemm.ee 5 months ago
^
for power.**
is usually in a programming setting (but it‘s usually a method and not an operator there.)
thisfro@slrpnk.net 5 months ago
This is the way
ofcourse@lemmy.ml 5 months ago
\cdot
for variables, e.g.,x \cdot y
\times
for numbers, e.g.,2 \times 8
- nothing for combination, e.g.,
2x
Ziglin@lemmy.world 5 months ago
I use
\times
and redefine it as\cdot
ricdeh@lemmy.world 5 months ago
People using the cross for scalar multiplication are insane
10_0@lemmy.ml 5 months ago
Or both when its appropiate
TheyCallMeHacked@discuss.tchncs.de 5 months ago
How about nothing at all
GravitySpoiled@lemmy.ml 5 months ago
cdot is within matrices and times is used for a m \times n matrix
Poach@lemmy.world 5 months ago
(
SkybreakerEngineer@lemmy.world 5 months ago
Depends on whether I want a scalar or vector, sine or cosine
Lemmygradwontallowme@hexbear.net 5 months ago
Aye, why not an asterisk / * ?
It’s also good for multiplying, innit?
r@piefed.social 5 months ago
\cdot for vector products, \times for multiplying plain numbers, whatever i feel like for anything else
dirkgentle@lemmy.ca 5 months ago
Vector dot products go with dot, cross with times.
r@piefed.social 5 months ago
yeah i accidentally left that out
vaderaj@lemmy.world 5 months ago
Cries in Linear Algebra
AtHeartEngineer@lemmy.world 5 months ago
lelgenio@lemmy.ml 5 months ago
Get rotated, idiot.
Image
wisha@lemmy.ml 5 months ago
I just downvoted your comment.
FAQ
What does this mean?
The amount of points on your comment will be decreased by one. The deduction will be federated across thousands of Lemmy instances, bringing you shame from across the Fediverse.
Why did you do this?
There are several reasons I may deem a comment to be unworthy of positive or neutral points. These include, but are not limited to:
As this is your first time receiving my downvote, I will provide reasons (listed below) to help you avoid making these mistakes again. Note that this will not be the case with future downvotes.
Am I banned from the Lemmy?
No - not yet. But you should refrain from making comments like this in the future. Otherwise I will be forced to issue an additional downvote, which may put your commenting and posting privileges in jeopardy.
I don’t believe my comment deserved a downvote. Can you un-downvote it?
Sure, mistakes happen. But only in exceedingly rare circumstances will I undo a downvote. If you would like to issue an appeal, shoot me a private message explaining what I got wrong. I tend to respond to PMs within several minutes. Do note, however, that over 99.9% of downvote appeals are rejected, and yours is likely no exception.
How can I prevent this from happening in the future?
Accept the downvote and move on. But learn from this mistake: your behavior will not be tolerated on mander.xyz or the Fediverse as a whole. I will continue to issue downvotes until you improve your conduct. Remember: Posting is privilege, not a right.
wisha@lemmy.ml 5 months ago
I didn’t actually downvoted your comment but apprently someone did and now I look like an asshole 😢.