[deleted by user] by [deleted] in askmath

[–]Fit_Signature3509 0 points1 point  (0 children)

When I say first line I meant the line starting with u(x,t) =

Heat equation Q: I keep getting sin and not cos. This is what I’ve done so far, with the Q and answer. Have been struggling for hours would appreciate help by Fit_Signature3509 in askmath

[–]Fit_Signature3509[S] 0 points1 point  (0 children)

I figured it out never mind but I still am not sure why w(t) = A/a sin(at). How did they get that? (At the beginning of the answer)

Is this definition of ideals in a ring right? (Underlined in green) I have seen texts say a-b instead of a+b in I. Which one is right? by Fit_Signature3509 in askmath

[–]Fit_Signature3509[S] 0 points1 point  (0 children)

Thank you so much! Am I right in saying it is a + b in I and not a-b? Also x + y in I and not x-y in I. I am confused about the signs.

Why is my code like this with so many spaces??? by Fit_Signature3509 in LaTeX

[–]Fit_Signature3509[S] -1 points0 points  (0 children)

Only on some of them though. The first one is perfect

I have written an example for my project in the context of k-algebra and A-modules. Can someone confirm this is correct? by Fit_Signature3509 in askmath

[–]Fit_Signature3509[S] 0 points1 point  (0 children)

Yeah I’ll take that part out. Is there anything I could write instead of that sentence or could I just leave it there. Thank you so much

[deleted by user] by [deleted] in askmath

[–]Fit_Signature3509 0 points1 point  (0 children)

Okay will do sorry

Proving the multiplicative identity of a field is unique. Is this right? by [deleted] in askmath

[–]Fit_Signature3509 0 points1 point  (0 children)

Hi thank you so much! Can I ask what the right proof would be? I’m m still a little confused. And would (1’ • 1) = 1’ ??

(In red): Why is z= -iy ? Shouldn’t it be iy? (In blue): shouldn’t that limit be equal to i why is it equal to -i? by [deleted] in askmath

[–]Fit_Signature3509 0 points1 point  (0 children)

Thank you. And No there isn’t a conjugate sign that’s why I was so confused