5.1.97 print

Syntax:

print ( expression )
print ( expression, "betti" )
print ( expression, format_string )

Type:

none (for the first two calling sequences), resp.
string (for the last calling sequence)

Purpose:

The first form prints the expression to the terminal and has no return value. Use the format string %p to print into a string (see below).
The second form prints the graded Betti numbers from a matrix. See the description of the format string "betti" below for more details.
The last form returns the printed output as a string. The format string determines which format to use to generate the string.

The following format strings are supported:

"betti"

The Betti numbers are printed in a matrix-like format where the entry in row and column is the minimal number of generators in degree of the -th syzygy module of (the 0th and 1st syzygy module of is and , resp.).

"%s"

returns string( expression )

"%2s"

similar to "%s", except that newlines are inserted after every comma and at the end

"%l"

similar to "%s", except that each object is embraced by its type such that it can be directly used for "cutting and pasting"

"%2l"

similar to "%l", except that newlines are inserted after every comma and at the end

"%;"

returns the string equivalent to typing expression;

"%t"

returns the string equivalent to typing type expression;

"%p"

returns the string equivalent to typing print(expression);

"%b"

returns the string equivalent to typing print(expression, "betti");

Example:

ring r=0,(x,y,z),dp; module m=[1,y],[0,x+z]; m; → m[1]=y*gen(2)+gen(1) → m[2]=x*gen(2)+z*gen(2) print(m); // the columns generate m → 1,0, → y,x+z string s=print(m,"%s"); s; → y*gen(2)+gen(1),x*gen(2)+z*gen(2) s=print(m,"%2s"); s; → y*gen(2)+gen(1), → x*gen(2)+z*gen(2) → s=print(m,"%l"); s; → module(y*gen(2)+gen(1),x*gen(2)+z*gen(2)) s=print(m,"%;"); s; → m[1]=y*gen(2)+gen(1) → m[2]=x*gen(2)+z*gen(2) → s=print(m,"%t"); s; → // m [0] module, rk 2, 2 generator(s) → m[1]=y*gen(2)+gen(1) → m[2]=x*gen(2)+z*gen(2) s=print(m,"%p"); s; → 1,0, → y,x+z → intmat M=betti(mres(m,0)); print(M,"betti"); → 0 1 → ------------------ → 0: 1 1 → ------------------ → total: 1 1 list l=r,M; s=print(l,"%s"); s; → (0),(x,y,z),(dp(3),C),1,1 s=print(l,"%2s"); s; → (0),(x,y,z),(dp(3),C), → 1,1 → s=print(l,"%l"); s; → list("(0),(x,y,z),(dp(3),C)",intmat(intvec(1,1 ),1,2))

See Type conversion and casting; betti; dbprint; fprintf; printf; short; sprintf; string type cast; type.