13.17.4 The harmonic conjugate:
harmonic_conjugate
The
harmonic_conjugate
command finds harmonic conjugates.
harmonic_conjugate
takes three arguments:
P
1
,
P
2
,
P
3
, three collinear points or three concurrent lines, or three parallel lines.
harmonic_conjugate(
P
1
,
P
2
,
P
3
)
returns and draws the harmonic conjugate of
P
1
,
P
2
and
P
3
.
Examples.
Input:
harmonic_conjugate(0,2,3/2)
Output:
Input:
affix(harmonic_conjugate(0,2,3/2))
Output:
3
Input:
harmonic_conjugate(line(0,1+i),line(0,3+i),line(0,i))
Output:
