https://www.php.net/manual/tr/function.fpow.php
PHP: fpow - Manual
Raise one number to the power of another, according to IEEE 754
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https://www.r-project.org/nosvn/R.check/r-release-macos-arm64/fpow-00check.html
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https://cran.r-project.org/web/checks/check_results_fpow.html
CRAN Package Check Results for Package fpow
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