diff --git a/semester3/numcs/parts/01_interpolation/02_piece-wise/00_intro.tex b/semester3/numcs/parts/01_interpolation/02_piece-wise/00_intro.tex
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+% Lecture: \chi here are used as RELU function!
diff --git a/semester3/numcs/parts/01_interpolation/02_piece-wise/01_hermite-interpolation.tex b/semester3/numcs/parts/01_interpolation/02_piece-wise/01_hermite-interpolation.tex
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+% 3rd order polynomial has 4 degrees of freedom (a, b, c and d), we have 4 coefficients for cubic hermite interpolation
+% CHIP algorithm ist formerhaltend