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Apr
28
comment Prove that $371\cdots 1$ is not prime.
I wonder why the downvote...
Apr
28
answered Prove that $371\cdots 1$ is not prime.
Apr
28
answered Minimize the norm of $w$.
Apr
22
comment Curve that lies on a solution surface
@user this is beyond me at this point
Apr
22
comment Curve that lies on a solution surface
@user for example, the surface where $f(x,y,u) = \sqrt{2}$ would certainly be a constant but non-zero $f$
Apr
22
comment Curve that lies on a solution surface
@user i think "$f$ is constant" and $f=0$ are not the same, but latter is special case of the former
Apr
22
comment Curve that lies on a solution surface
@user likely because you want to claim something about all curves in the solution surface with some nice properties
Apr
22
answered Determine where h(x) := x $\lvert x \rvert$ is differentiable from R to R.
Apr
22
comment Finding upper bounds of a set
Yes, it is correct.
Apr
22
comment Curve that lies on a solution surface
@user if you like, this can be said.
Apr
22
answered Curve that lies on a solution surface
Apr
22
answered SDE Modeling: Ito vs. Stratonovich
Apr
22
answered Inverse of an ordered pair?
Apr
22
comment Recurrence Relations with Geometric Series
@MD_90 not so simple. Notice that $5^{k-1} >> 2^k$ even though the exponent is smaller since $2^k = 2 \cdot 2^{k-1}$...
Apr
22
answered Recurrence Relations with Geometric Series
Apr
22
answered Given the solution to some differential equation, is the original equation necessarily unique?
Apr
22
revised Evaluate $\int\frac{x^2}{\sqrt{1+x+x^2}}\,dx$
added 33 characters in body
Apr
1
revised Prove that the set of all finite sequences of real numbers has the same cardinality as the set $\mathbb{R}$ of reals.
LaTex
Apr
1
comment Is this statement correct $f(n) = \theta(n) \land g(n) = \Omega(n) \Longrightarrow f(n)g(n) = \Omega(n^2)$?
@Rinzler yes indeed
Apr
1
answered Is this statement correct $f(n) = \theta(n) \land g(n) = \Omega(n) \Longrightarrow f(n)g(n) = \Omega(n^2)$?