number-zero -- r7rs Type

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Sub-types tree

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• complex-zero:
  • real-zero:
    • rational-zero:
      • ...

Super-types

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• number-not-inf-not-nan;
• number-positive-or-zero-not-inf;
• number-negative-or-zero-not-inf;

Super-types recursive

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• number-not-inf;
• number;
• number-not-nan;
• number-positive-or-zero;
• number-negative-or-zero;

Sub-types

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• complex-zero;

Sub-types recursive

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• real-zero;
• rational-zero;
• integer-zero;
• exact-integer-zero;
• range-length-zero;

Referent definitions as input

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• zero?;
• -;
• sqrt;

Referent definitions as input (recursive)

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• number?;
• integer?;
• real?;
• rational?;
• complex?;
• exact?;
• inexact?;
• exact-integer?;
• =;
• +;
• *;
• /;
• expt;
• square;
• inexact;
• exp;
• log;
• sin;
• cos;
• tan;
• asin;
• acos;
• atan;
• number->string;
• <;
• <=;
• >=;
• >;
• exact;
• finite?;
• infinite?;
• nan?;

Note: These definitions consume an input that is a super-type.

Referent definitions as output

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• -;

Referent definitions as output (recursive)

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• abs;
• imag-part;
• angle;
• sqrt;
• numerator;
• exact-integer-sqrt;
• length;
• vector-length;
• string-length;
• bytevector-length;

Note: These definitions produce an output that is a sub-type.

Predicate

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(lambda (value) (and (number? value) (zero? value)))

Categories

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• types-numbers;
• types-constants;

Categories recursive

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• types;