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Apr
27
answered Having trouble deriving the symbols used in a quadratric approximation problem.
Apr
27
revised A nice and hard colouring problem
deleted 7 characters in body
Apr
27
revised Similar triangle proof in parallelogram
added 59 characters in body
Apr
26
answered A nice and hard colouring problem
Apr
26
answered Similar triangle proof in parallelogram
Apr
26
answered Differential Equation $\frac{d^2y}{dx^2}=\left( \frac{dy}{dx} \right)^2 + 1$
Apr
26
comment $f$ has pole of order $m$ and $g$ has a pole of order $n$ at $z_{0}$, show $f+g$ has isolated singular point there
Your thoughts are correct in all points.
Apr
26
comment weird relation modulo
@David天宇Wong: Thank you for notifying the slip.
Apr
26
revised weird relation modulo
deleted 4 characters in body
Apr
26
comment euler's theorem of homogeneuos function
The above is a proof.
Apr
25
answered Complex Analysis: How isolated singular points behave
Apr
25
revised How to calculate a definite integral with complex numbers involved?
added 110 characters in body
Apr
25
answered Solve $y'=e^{x^2}y$ (with $3$ terms only) in using power series
Apr
25
answered How to calculate a definite integral with complex numbers involved?
Apr
25
answered euler's theorem of homogeneuos function
Apr
25
answered Show that $d(z,z_1)$ is a metric.
Apr
24
revised In how many ways can the letters of word $PERMUTATIONS$ be arranged if there are always 4 letters between P and S?
deleted 1 character in body
Apr
24
answered In how many ways can the letters of word $PERMUTATIONS$ be arranged if there are always 4 letters between P and S?
Apr
24
answered FUNCTIONS : Theoretical Doubt
Apr
24
answered Prove that the function $f:\mathbb{R}^2\rightarrow\mathbb{R}$ is constant