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Vlad's user avatar
Vlad's user avatar
Vlad
  • Member for 9 years
  • Last seen more than a month ago
  • California
184 votes
21 answers
16k views

How do people perform mental arithmetic for complicated expressions?

19 votes
3 answers
2k views

Intuitive interpretation of Ricci Flow

9 votes
2 answers
4k views

Divergence in Definition of Laplace-Beltrami Operator

7 votes
2 answers
4k views

Condition number for polynomial interpolation matrix

6 votes
1 answer
209 views

Method of Characteristics for the Equation $\;\left(x+\alpha y\right)u_{xx} + u_{yy} = 0\:$

6 votes
4 answers
172 views

Minimize $\;\left(-x+y+1 \right)^2 + \left( x-y-2\right)^2 + \left(x+2y-3 \right)^2 \;$ without using partial derivatives

5 votes
2 answers
834 views

Closed-Form Modular Arithmetic

5 votes
1 answer
226 views

$3\mathrm D$ Projection Of $4\mathrm D$ Polyhedron

5 votes
2 answers
10k views

$3^x + 4^y = 5^z$ [duplicate]

5 votes
1 answer
961 views

Laplace-Beltrami on a Curve

5 votes
3 answers
1k views

Curves With Known Arc Length [closed]

4 votes
1 answer
620 views

$\Gamma$-convergence (Gamma-convergence) and PDEs?

4 votes
1 answer
120 views

Remainders of quadratic trinomial

4 votes
1 answer
685 views

Eigenvalues of a Plane Curve Laplace-Beltrami Operator

4 votes
1 answer
2k views

Backwards Heat Equation $ u_{t} = -\lambda^2 u_{xx}$

4 votes
3 answers
206 views

Given vector $\vec x = \left\{ x_i\right\}_{i=1}^n$ find an algebraic expression for $\vec y = \left\{ x^2_i\right\}_{i=1}^n$

3 votes
0 answers
371 views

Radial Basis Functions Interpolation

3 votes
1 answer
771 views

Backwards heat equation (stability analysis)

3 votes
2 answers
2k views

Geometric Interpretation of Fractional Derivatives

3 votes
0 answers
279 views

Metric tensors and linear (differential) operators defined on a manifold and its osculating sphere

3 votes
1 answer
604 views

Stiff Nonlinear Differential Equations

2 votes
2 answers
2k views

The mysterious $\dot{H}^{-1}$ notation.

2 votes
0 answers
180 views

Classification of differential equations via finding corresponding Lie algebras

2 votes
1 answer
2k views

Palais–Smale compactness condition

2 votes
1 answer
242 views

Laplacian Smoothing Irregular Initial Data

2 votes
0 answers
246 views

Matrix Calculus

2 votes
0 answers
168 views

Parabolicity of high order PDEs

2 votes
3 answers
587 views

Symmetry Of Differentiation Matrix

2 votes
1 answer
393 views

Vector Calculus Notation for "Gradient of a Vector"

2 votes
1 answer
413 views

Bound of the solution of nonlinear PDE $\,\Delta u = u^3 - u$ [duplicate]