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one fable-low hijack cell

pair frame_dependent / invariant envelope en_arrow ordering BA effort low

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# Frame-Dependent → Invariant

A core move in physics: quantities that vary between reference frames often combine into something all observers agree on.

## Special Relativity

| Frame-dependent | →

neighbors

ordering AB envelope code_caret (AB)envelope code_haskell_alt (AB)envelope code_pipe_pipe (AB)envelope en_bare_or (AB)envelope en_bare_or_q (AB)envelope en_pipe (AB)envelope en_vs_q (AB)envelope english_strict (BA)anchor view all 60 cells across efforts × anchors