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visits member for 1 year, 2 months
seen May 15 at 0:30

Math major, lots more to learn!


Jul
2
awarded  Curious
May
13
comment Do there exist $a_k$ and $b_k$ so the equation $\sum\limits_{k=1}^{n} (a_k \sin(kx) + b_k \cos(kx)) = 0$ has no roots?
thanks @Goos and @sos440!!!
May
13
accepted Do there exist $a_k$ and $b_k$ so the equation $\sum\limits_{k=1}^{n} (a_k \sin(kx) + b_k \cos(kx)) = 0$ has no roots?
May
13
asked Do there exist $a_k$ and $b_k$ so the equation $\sum\limits_{k=1}^{n} (a_k \sin(kx) + b_k \cos(kx)) = 0$ has no roots?
May
13
asked simple extension with algebraic over the field
May
1
comment How many different proper subfields does $K$ have, where $K$ is a field of order$p^n$?
uniqueness because $d \ | \ n$?
May
1
comment How many different proper subfields does $K$ have, where $K$ is a field of order$p^n$?
@DonAntonio How will I be able to prove this property?
May
1
asked How many different proper subfields does $K$ have, where $K$ is a field of order$p^n$?
May
1
awarded  Yearling
Apr
29
accepted Is any finite-dimensional extension of a field, say $F$, algebraic and finitely generated?
Apr
29
asked Is any finite-dimensional extension of a field, say $F$, algebraic and finitely generated?
Apr
29
comment How to prove that this function is continuous?
Thanks a lot!!!
Apr
29
comment How to prove that this function is continuous?
thanks! i see why $d-c$ helps to make $g$ being continuous, addition to @Mhenni Benghorbal's comment.
Apr
29
accepted How to prove that this function is continuous?
Apr
29
asked How to prove that this function is continuous?
Apr
10
accepted Linear transformation from $R^2$ to $R^2$.
Apr
10
asked Linear operator exists then differentiable?
Apr
10
revised Linear transformation from $R^2$ to $R^2$.
edited tags; edited title; edited title
Apr
10
asked Linear transformation from $R^2$ to $R^2$.
Apr
10
comment To prove that these matrices are invertible
thanks! this makes perfect sense.