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21.2.8 Comparison Predicates

=	Scheme Procedure

Return #t if all parameters are numerically equal.

<	Scheme Procedure

Return #t if the list of parameters is monotonically increasing.

>	Scheme Procedure

Return #t if the list of parameters is monotonically decreasing.

<=	Scheme Procedure

Return #t if the list of parameters is monotonically non-decreasing.

>=	Scheme Procedure

Return #t if the list of parameters is monotonically non-increasing.

zero?

Scheme Procedure

Return #t if z is an exact or inexact number equal to zero.

positive?

Scheme Procedure

Return #t if x is an exact or inexact number greater than zero.

negative?

Scheme Procedure

Return #t if x is an exact or inexact number less than zero.