Changes

===Cosmological Constant <math>\Lambda</math>===

===Cosmological Constant <math>\Lambda</math>===

Non existing in the real world but "Cosmologists" still don't know why Einstein called it ''"the biggest blunder of my life"''.

Non existing in the real world but [[relativists]] still don't know why Einstein called it ''"the biggest blunder of my life"''. Just know that he did.

Couldn't figure it out why though<ref>Misner, Thorne, and Wheeler, 1973, ''"Gravitation"'', page 410.</ref>. They use it as "[[dark matter]]".

===Symmetric metric tensor of 4D spacetime===

===Symmetric metric tensor of 4D spacetime===