Peeter Joot's Blog

Center of mass on line of symmetry: questions from a little guy

Customized MathJax now reinstalled on the blog.

Screwed up my blog’s LaTeX (mathjax) plugin.

Enterprise COBOL 6.5 TYPEDEF and “User Defined Functions”

Stream of consciousness dump: new job, claude terminal, vscode, vim mode, …

Line stepping through MLIR with a debugger!

Some line integral examples of the Fundamental theorem of geometric calculus

One more version tagged for the silly compiler: V8

Debugging wrong debug location info for a CALL in my silly language.

V6 of my silly MLIR based compiler is tagged.

MLIR toy compiler V5 tagged. Array element assignment/access is implemented.

Added IF/ELSE support to my toy MLIR/LLVM compiler.

Attempting to learn to use VSCode: some keymappings and notes.

mixed results with more C++ module experimentation

C++ sample code with modules!

Curl of Curl. Tensor and GA expansion, and GA equivalent identity.

A fun application of Green’s functions and geometric algebra: Residue calculus

Summary of some gradient related Green’s functions

Green’s function for the spacetime gradient (and solution of Maxwell’s equation)

Green’s function for the 3D wave equation.

Derivation of the 2D Green’s function for the wave equation operator.

Bandwidth of some bandpass filters

Deriving the Green’s functions for the 1D wave equation.

Green’s function for the wave equation: 1D and 2D cases.

Correcting the errors: Green’s functions for the 1D Helmholtz and Laplacian operators.

A trilogy in 7+ parts: A better check of the 1D Helmholtz Green’s function.

A trilogy in six+ parts: 1D Laplacian Green’s function

A trilogy in five+ parts: Confirming an error in the derived 1D Helmholtz Green’s function.

A trilogy in four+ parts: The 2D Laplacian Green’s function.

Part 3/3. 2D Green’s functions for the Helmholtz (wave equation) operator.

Part 2. 3D Green’s function for the Helmholtz (wave equation) operator

Part 1. Green’s functions for the Helmholtz (wave equation) operator in various dimensions.

An “easy” integral from Jackson’s electrodynamics