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{SECT 0 {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 63 "restart; # quadratic
 polynomial, C0 3 node line element (L3_C0)" }}}{EXCHG {PARA 0 "> " 0 
"" {MPLTEXT 1 0 15 "with(linalg):\n" }{MPLTEXT 1 0 62 "P:=matrix(1,3,[
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{TEXT 209 79 "Warning, the protected names norm and trace have been re
defined and unprotected" }}{PARA 11 "" 1 "" {XPPMATH 20 "=6\"6$;\"\"\"
F&;F&\"\"$E\\[l$6$F&\"\"#I\"xGF#6$F&F(*$)F,F+F&6$F&F&F&" }}}{EXCHG 
{PARA 0 "> " 0 "" {MPLTEXT 1 0 62 "# coordinate system, 0 <= x <= L fo
r two identities in G below" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 
54 "G:=matrix(3,3,[[1, 0, 0],[1,L/2,L^2 /4],[1, L, L^2]]);" }}{PARA 11
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1 0 59 "G_inv:=evalm(inverse(G)); # exists for valid interpolations" }
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{PARA 11 "" 1 "" {XPPMATH 20 "=6\"6$;\"\"\"F&;F&\"\"$E\\[l$6$F&\"\"#,&
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0 40 "Load := map(int,transpose(N), x = 0..L);" }}{PARA 11 "" 1 "" 
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