LIB "chern.lib";
ring r=0, (t), dp;
// the coefficients of the Chern character of the complex projective line
print( chProj(1) );
==> [1]:
==>    1
==> [2]:
==>    2
// the coefficients of the Chern character of the complex projective plane
print( chProj(2) );
==> [1]:
==>    2
==> [2]:
==>    3
==> [3]:
==>    3/2
// the coefficients of the Chern character of the complex 3-dimentional projectice space
print( chProj(3) );
==> [1]:
==>    3
==> [2]:
==>    4
==> [3]:
==>    2
==> [4]:
==>    2/3