German (language) by Ciro Santilli 35 Updated +Created
Kronecker delta by Ciro Santilli 35 Updated +Created
Science fiction film by Ciro Santilli 35 Updated +Created
Video file format by Ciro Santilli 35 Updated +Created
Digital currency by Ciro Santilli 35 Updated +Created
Extant by Ciro Santilli 35 Updated +Created
Particle accelerator by Ciro Santilli 35 Updated +Created
Grade (exam) by Ciro Santilli 35 Updated +Created
Non-Euclidean geometry by Ciro Santilli 35 Updated +Created
Five Eyes by Ciro Santilli 35 Updated +Created
Regional accents of English by Ciro Santilli 35 Updated +Created
Vacuum tube by Ciro Santilli 35 Updated +Created
Magnetism by Ciro Santilli 35 Updated +Created
Implicit metric signature in Einstein notation by Ciro Santilli 35 Updated +Created
Then a specific metric is involved, sometimes we want to automatically add it to products.
E.g., in a context considering the common Minkowski inner product matrix where the 4x4 matrix and is a vector in
which leads to the change of sign of some terms.
Eigendecomposition of a matrix by Ciro Santilli 35 Updated +Created
Every invertible matrix can be written as:
where:
Note therefore that this decomposition is unique up to swapping the order of eigenvectors. We could fix a canonical form by sorting eigenvectors from smallest to largest in the case of a real number.
Intuitively, Note that this is just the change of basis formula, and so:
  • changes basis to align to the eigenvectors
  • multiplies eigenvectors simply by eigenvalues
  • changes back to the original basis
Education as a system of indoctrination by Ciro Santilli 35 Updated +Created
Whenever Ciro Santilli walks in front of a school and sees the tall gates it makes him sad. Maybe 8 year olds need gates. But do we need to protect 15 year olds like that? Students should be going out to see the world, both good and evil not hiding from it! We should instead be guiding them to the world. But instead, we are locking them up in brainwashing centers.
Video "The Purpose of Education by Noam Chomsky (2012)" puts it well, education can be either be:
He has spoken about that infinitely, e.g. from when he was thin: www.youtube.com/watch?v=JVqMAlgAnlo
Bibliography:
Undirected graph by Ciro Santilli 35 Updated +Created
Digital-to-analog converter by Ciro Santilli 35 Updated +Created

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