diff --git a/TST/01_Derivation/3B_fomules.pdf b/TST/01_Derivation/3B_formules.pdf
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diff --git a/TST/01_Derivation/3B_fomules.tex b/TST/01_Derivation/3B_formules.tex
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rename from TST/01_Derivation/3B_fomules.tex
rename to TST/01_Derivation/3B_formules.tex