FeynCalc Reference Guide: Write2

Write2

Description

Write2[file, val1 = expr1, val2 = expr2, ...] writes the settings val1 = expr1, val2 = expr2 in sequence followed by a newline, to the specified output file. Setting the option FormatType of Write2 to FortranForm results in FORTRAN syntax output.

The continuation character for FORTRAN output can be controlled by changing $FortranContinuationCharacter.

See also: Isolate, PaVeReduce.

Examples

This writes the assignment r=t to a file.

This shows the contents of the file.

r = ( 4*a^4 - 8*a^3*(b + c) - 4*a*(b + c)*(b^2 + c^2) +

(b^2 + c^2)^2 + 8*a^2*(b^2 + b*c + c^2)

);

W[1] = (b + c

);

W[2] = (b^2 + c^2

);

W[3] = (b^2 + b*c + c^2

);

r = ( 4*a^4 + x - 8*a^3*HoldForm[W[1]] -

4*a*HoldForm[W[1]]*HoldForm[W[2]] + HoldForm[W[2]]^2 +

8*a^2*HoldForm[W[3]]

);

This is how to write out the expression t2 in Fortran format.

W(1)= b + c

W(2)= b**2 + c**2

W(3)= b**2 + b*c + c**2

r = 4*a**4 + x - 8*a**3*W(1) - 4*a*W(1)*W(2) + W(2)**2 +

& 8*a**2*W(3)

The FeynCalc Book

UnDeclareNonCommutative

Converted from the Mathematica notebook Write2.nb