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Apr
14
awarded  Civic Duty
Feb
24
comment Tridiagonal matrix w/trigonometric eigenvalues
The proof of the existence of the diagonal matrix $D$ w/alternating in sign entries involves special matrices and continued fractions...
Feb
21
comment Tridiagonal matrix w/trigonometric eigenvalues
pertains Chebyshev polynomials of the first and second kind...
Feb
16
revised Tridiagonal matrix w/trigonometric eigenvalues
added 2 characters in body; edited tags
Feb
14
revised Eigenvalues of a tridiagonal trigonometric matrix
added 10 characters in body
Feb
14
revised Eigenvalues of a tridiagonal trigonometric matrix
deleted 359 characters in body
Feb
14
asked Tridiagonal matrix w/trigonometric eigenvalues
Feb
13
accepted on a quantisation of the bell curve
Feb
12
asked on a quantisation of the bell curve
Feb
11
comment What's the intuition behind Pythagoras' theorem?
FYI: 10*10+11*11+12*12=13*13+14^14=169+196=365, the number of days in a non-leap year and the number of squares in the year calendar...
Feb
11
comment Definition of “well defined” in mathematics
a problem may be both "well-defined" and "ill-posed"...
Jan
13
comment How many sequences of rational numbers converging to 1 are there?
can one describe/construct all such sequences from the $\epsilon,\delta$ definition?
Jan
12
revised Relationship b/w PDE periodic boundary values
added 2 characters in body
Jan
12
comment Relationship b/w PDE periodic boundary values
Follows from min/max principle for sub/superharmonic functions?
Jan
12
revised Relationship b/w PDE periodic boundary values
added 109 characters in body
Jan
7
revised Relationship b/w PDE periodic boundary values
improved wording
Jan
7
revised Relationship b/w PDE periodic boundary values
added 62 characters in body
Jan
7
comment Relationship b/w PDE periodic boundary values
In the layered case $\gamma(x,y)=\gamma(y)>0$ the solution's $u(x,y)=a(y)e^{kx}$, $μ_k=k∈Z$ and $$\lambda_k=|k|\beta(|k|)$$...
Jan
7
revised Relationship b/w PDE periodic boundary values
added 84 characters in body
Jan
6
comment Dividing a unit square into rectangles
there's a connection b/w rectangular tillings and current flow on planar electrical networks, the ratio plays role of conductivity...