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bolbteppa
  • Member for 10 years, 11 months
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122 votes
1 answer
3k views

Solving Special Function Equations Using Lie Symmetries

94 votes
1 answer
3k views

Geometric & Intuitive Meaning of $SL(2,R)$, $SU(2)$, etc... & Representation Theory of Special Functions

49 votes
1 answer
1k views

Hahn-Banach From Systems of Linear Equations

26 votes
1 answer
16k views

Calculate the Lie Derivative

23 votes
3 answers
16k views

Vector Calculus Identities Using Differential Forms

23 votes
1 answer
7k views

Characteristics in the theory of PDE's - What's Going On?

22 votes
3 answers
6k views

What is a Theta Function?

20 votes
1 answer
2k views

Residue Proof of Fourier's Theorem Dirichlet Conditions

11 votes
2 answers
2k views

Divergent Series Intuition

10 votes
1 answer
2k views

Integral Definition of Exterior Derivative?

10 votes
2 answers
2k views

Floquet Theory - Reducing ODE's to Constant Coefficient ODE's?

9 votes
1 answer
474 views

Russian old merchant problems

9 votes
0 answers
443 views

Sard's Theorem Using Integration?

8 votes
1 answer
346 views

Riemann Curvature Not Along Geodesics?

7 votes
1 answer
958 views

Motivating Characteristic Classes Using $S^2$

6 votes
1 answer
497 views

Motivating the Cross-Ratio and 'the ratio of ratio's' in $\mathbb{R}\mathbb{P}^2$

6 votes
6 answers
2k views

Convex Sets in Functional Analysis?

5 votes
1 answer
854 views

Sturm-Liouville Questions

4 votes
0 answers
757 views

Orthogonal Coordinate Systems Intuition

4 votes
0 answers
70 views

Perturbation Theory on Finite Domains

4 votes
0 answers
208 views

Non-Integrability of a Pfaffian - Geometric Interpretation?

4 votes
1 answer
193 views

Arbitrary Constants in Orthogonal Polynomials?

4 votes
1 answer
807 views

What is a Topological Group Intuitively?

4 votes
0 answers
254 views

Geometrically Integrating $R(x,\sqrt{Ax^2+Bx+C})$ & Motivating Euler Substitutions

4 votes
1 answer
1k views

Geometric Derivation of the D-Bar Operator $\frac{\partial}{\partial z} = \frac{1}{2}(\frac{\partial }{\partial x} - i\frac{\partial }{\partial y})$

4 votes
0 answers
740 views

Green Identities via Differential Forms

4 votes
1 answer
110 views

Branch Cuts of $f(z) + g(z) = \sqrt{p(z)} + \sqrt{q(z)}$

4 votes
1 answer
1k views

Ideals - A Geometric Interpretation?

4 votes
1 answer
298 views

How Do Engel and Lie Arise Naturally?

4 votes
1 answer
387 views

Representations of $S O( n )$ coming from $GL( N ,\mathbb{ R})$