diff --git a/README.md b/README.md
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--- a/README.md
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@@ -5,3 +5,4 @@
 [![Stack-nightly](https://github.com/stla/jacobi-elliptic/actions/workflows/Stack-nightly.yml/badge.svg)](https://github.com/stla/jacobi-elliptic/actions/workflows/Stack-nightly.yml)
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+Evaluation of the Neville theta functions and the Jacobi elliptic functions.
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