fix(stats): hold the Student-t tails past t-squared overflow

Assisted-by: GLM 5.3 Flash
2026-09-27 17:03:36 +02:00
parent 2f9358c512
commit 275de79123
6 changed files with 113 additions and 10 deletions
@@ -28,6 +28,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Viterbi` refuses a sequence of probability zero under the model,
  the same refusal `Forward` makes, instead of returning a meaningless
  path beside a log probability of -Inf.
+- The Student-t tails stay accurate past the point t squared
+  overflows float64: `StudentTCDF`, the regression coefficient
+  p-values and `NoncentralTCDF` at extreme t answer the tail the
+  format still holds instead of a silent zero or an error naming a
+  NaN.

 ## [1.0.0] - 2026-09-03