Either scientists lose their ego and learn to explain concepts

>>8711353
He doesn't say it's obvious, he says it's elementar. Sure coordinate change are annoying, but there isn't much to them. Just follow the rule.

>>8711353

It's not arrogance, it's a statement of what you should be able to do at this level. If it's not obvious then backtrack

Brainlet tier
>proof is not shown/assumed to be true
Undergrad tier
>proof is shown
Genius tier
>proof is left as an exercise for the reader
Bogandoff tier
>it is obvious that

I approve of the ban on brainlets

>>8711438
This. It is not arrogance, but instead a way to tell the reader that if you cannot do this you should read something else first.

>>8711353
The answer to this is printed on the inside cover of Griffiths' emag book

It very very rarely has to do with ego, rather with efficiency.

>>8711353
you have to learn how to do calculus before you learn to do calculus based science. The text makes the reasonable assumption of calculus proficiency for its audience.

should every text be forced to explain how to do arithmetic and algebra too?

stop being an idiot

File: 1488091054673.png (100KB, 258x330px) Image search: [Google]

100KB, 258x330px

>>8711353
You are expected to figure it out yourself.
If not, you're not ready to study the material at hand.
You have a function [math]f\subset X\times Y[/math].
This is given in form of two sets and an algorithm.
If you show that the points [math]fx[/math] assume the form [math]gx[/math] or whatever, you say that the new function is [math]g[/math].
Again, if YOU don't fill the gaps you're not going to understand half of it.

File: 558194.jpg (16KB, 317x475px) Image search: [Google]

16KB, 317x475px

>>8713170
I suggest you start from here and move your way up to more complex math.

>>8713175
@OP.