# `PtcRunner.Lisp.Runtime.SpecialValues`
[🔗](https://github.com/andreasronge/ptc_runner/blob/main/lib/ptc_runner/lisp/runtime/special_values.ex#L1)

Unified handling for IEEE 754 special values (Infinity, NaN) in PTC-Lisp.

# `any_infinite?`

Check if any argument is infinite.

# `any_nan?`

Propagation rules: any NaN input results in NaN.

# `infinite?`

# `nan?`

# `neg_infinite?`

# `pos_infinite?`

# `special?`

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*Consult [api-reference.md](api-reference.md) for complete listing*