Special relativity and steps towards general relativity/image gallery

SR edit

spacetime unchanged, coordinate system "rotated" edit

invariant interval edit

rapidities add to arbitrarily big positive or negative numbers edit

standard SR effects edit

tachyons: what if they exist? edit

past time cone, here-now, future time cone, elsewhere, null boundaries edit

avoid wrong assumptions, otherwise paradoxes edit

Ladder (= pole-barn) paradox edit

Multiply connected twins paradox edit

Dynamics edit

GR edit

co- versus contra-variant: how coordinates and basis vectors change edit

a coordinate is a scalar field, coordinate singularity edit

vector and 1-form field bases edit

charts, atlas, manifold edit

parallel transport edit