_index.org

Gram-Schmidt

Last edited: August 8, 2025

OMG its Gram-Schmidtting!!! Ok so like orthonormal basis are so nice, don’t you want to make them out of boring-ass normal basis? Of course you do.

Suppose \(v_1, … v_{m}\) is a linearly independent list in \(V\). Now let us define some \(e_{1} … e_{m}\) using the procedure below such that \(e_{j}\) are orthonormal and, importantly:

\begin{equation} span(v_1, \dots, v_{m}) = span(e_{1}, \dots, e_{m}) \end{equation}

The Procedure

We do this process inductively. Let:

\begin{equation} e_1 = \frac{v_1}{\|v_1\|} \end{equation}

grammar

Last edited: August 8, 2025

A grammar is a set of logical rules that form a language. (more precisely defined in goals of a grammar)

goals of a grammar

  • explain natural languages in syntax + semantics
  • have described algebras which can be used to evolve the syntax
  • …that describe the grammatical operations

The formalism here is that a rigorous grammar should have:

  1. semantic accountability
  2. generativity

Graph Isomorphism is in NP

Last edited: August 8, 2025

Recall the definition of graph : if you can relabel \(G\) to get \(G’\), that they are the same up to relabling.

\begin{equation} \text{GISO} = \qty {\langle G,G’ \rangle \mid G \cong G’} \end{equation}

Because the prover can just give the relabeling.

gravitational entanglement

Last edited: August 8, 2025

Using constructor theory to test whether or not gravity in quantum theory is just entanglement.

This solves problem with gravity.

gravitational potential energy

Last edited: August 8, 2025