proof ch:14-calculus-of-variations@proof-50

open in the book · parts/02-mathematical-methods/14-calculus-of-variations.tex:3344

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proof : ch:14-calculus-of-variations@proof-50proofproposition 16.105: The optical invariant in a stratified medium16.105equation 16.89: eq:calcvar-optical-length16.89theorem 16.29: Beltrami identity16.29

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