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