“**Algebraic Topology**” can detect the Multi-dimensional neural network in our brain – by studying the **Homology** (同调) and **co-Homology (上同调)** with the help of Linear Algebra (multi-dim Matrix) & Computers.

Homology= compute the number of “holes” in multi-dim space.

Neurons formed in the brain can be modeled in Math (Topology) by Simplex 单纯 (plural : Simplices), billions of them interconnected into a complex -“Simplicial Complex” (单纯复体)。