Fundamental particles such as the electron or the photon have an intrinsic spin, and this spin can't change - for example, an electron always has a spin of 1/2.

I don't think the Pauli equation would change that.

Pauli was a famous Austrian physicist, most notable for his spin theory, and for the Pauli Exclusion principle, named for him, which states that no two fermions can share the same quantum numbers (those numbers being shell, subshell, energy shift, and and spin).

Pauli - it is the Pauli exclusion principal.

Pauli exclusion principle of anti alligned spin

This is the Pauli exclusion principle. Wolfgang Pauli was a Jewish physicist, Nobel prize laureate.