ys wong
  • Member for 7 years, 10 months
  • Last seen more than 3 years ago
4 answers
11 votes
21k views
4 bookmarks
Prove that trees have at least two vertices of degree one
2 answers
7 votes
4k views
2 bookmarks
Continuity of $\frac{2xy}{x^2+y^2}$ at $(0,0)$
2 answers
6 votes
2k views
Finding the limits of a multivariable function $\frac{x^2y^2}{x^4+y^2}$
1 answers
5 votes
2k views
Proving dimension formula in linear algebra
1 answers
5 votes
3k views
9 bookmarks
Finding continuity and differentiability of a multivariate function
2 answers
5 votes
2k views
2 bookmarks
Do these two parametric equations represent the same curve?
2 answers
4 votes
114 views
1 bookmarks
Determining the rank of the matrix (Linear algebra)
1 answers
4 votes
46 views
Finding the invertibility of a matrix (linear algebra)
4 answers
4 votes
214 views
2 bookmarks
Show that $\,\,\, \lim_{n\to\infty} \sin\bigl(\pi\sqrt{n^2+1}\bigr)=0 $
1 answers
3 votes
496 views
2 bookmarks
Will Fermat's last theorem hold true on the Complex Plane?
3 answers
3 votes
107 views
1 bookmarks
Evaluate the following complex integrals using parameterisation $\int \limits_{\beta} f(z) dz$
4 answers
3 votes
2k views
2 bookmarks
Proving whether the difference of two series is convergent of divergent
2 answers
3 votes
165 views
Proving the converging of subsequences (Real Analysis)
2 answers
3 votes
86 views
1 bookmarks
Proving a property of a prime number (Elementary number theory)
1 answers
3 votes
4k views
Probability that 4 friends will be in the same class
1 answers
3 votes
54 views
1 bookmarks
Finding a system of linear equations (Linear Algebra)
3 answers
3 votes
5k views
Finding the probability of whether it would rain on weekends
1 answers
3 votes
2k views
2 bookmarks
Solving a second Order ODE of a catenary curve
2 answers
3 votes
579 views
Existences and uniqueness theorem, finding a unique solution of a first order ODE
5 answers
3 votes
2k views
Multivariate limit $\lim_{(x,y) \to (0,0)} \frac{{x{y^2}}}{{{x^2} + {y^4}}} = 0$
2 answers
2 votes
789 views
1 bookmarks
Finding multivariable limits for the function $\frac{3x^2y}{x^2+y^2}$
2 answers
2 votes
212 views
1 bookmarks
Proof that the hyperbolae $x^2-y^2 =a$ and $xy=b$ are orthogonal via parametric equations
0 answers
2 votes
742 views
2 bookmarks
Solve the Neumann problem for the wave equation on the half line $-\infty < x <0 $.
4 answers
2 votes
2k views
Multivariable limit of rational function
3 answers
2 votes
1k views
1 bookmarks
Prove/Disprove that the set of rational numbers is uncountable (Real Analysis)
0 answers
2 votes
226 views
1 bookmarks
Showing that the equation $f(x)=1$ satisfy the condition of the fourier integral
4 answers
2 votes
204 views
Calculate $5^{2016} \pmod 7$
2 answers
2 votes
95 views
Determining the span of the vector space (linear Algebra)
4 answers
2 votes
152 views
Proving the invertibility of an $n$ by $n$ matrix (Linear algebra)
1 answers
2 votes
61 views
Proving the invertibility of matrices $AB$ and $BA$
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