Special relativity and steps towards general relativity/image gallery
< Special relativity and steps towards general relativitySR
spacetime unchanged, coordinate system "rotated"
invariant interval
rapidities add to arbitrarily big positive or negative numbers
standard SR effects
tachyons: what if they exist?
past time cone, here-now, future time cone, elsewhere, null boundaries
avoid wrong assumptions, otherwise paradoxes
Ladder (= pole-barn) paradox
Multiply connected twins paradox
Dynamics
GR
co- versus contra-variant: how coordinates and basis vectors change
a coordinate is a scalar field, coordinate singularity
vector and 1-form field bases
charts, atlas, manifold
parallel transport
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