abstract Riemann surface

adjoint Riemann boundary value problem

HLLE Riemann solver

MHD Riemann problem

Riemann

Riemann approximate solver

Riemann integrals

Riemann problem

Riemann solver

Riemann Space

Riemann surface

Riemann surfaces

Riemann theorem

A finite-dimensional Hilbert space

a truncated(N+1)-dimensional Hilbert space

adjoint hilbert problem

Hilbert

Hilbert energy spectrum

Hilbert filter

Hilbert Huang Transform