From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Thu, 20 May 2021 20:01:33 +0000 (+0200)
Subject: Add three changelog entries for new tutorials.
X-Git-Tag: v9.3.0-rc1~24^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F12268%2Fhead;p=dealii.git

Add three changelog entries for new tutorials.
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diff --git a/doc/news/changes/major/20210504Bangerth b/doc/news/changes/major/20210504Bangerth
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+++ b/doc/news/changes/major/20210504Bangerth
@@ -0,0 +1,6 @@
+New: The step-77 tutorial explores one of the mentioned extensions to step-15,
+namely implementing a proper step length control algorithm. It uses the KINSOL
+nonlinear solver package from the SUNDIALS library to incorporate a line
+search method into the incremental update for Newton's method.
+<br>
+(Wolfgang Bangerth, 2021/05/04)
diff --git a/doc/news/changes/major/20210506Jean-PaulPelteret b/doc/news/changes/major/20210506Jean-PaulPelteret
new file mode 100644
index 0000000000..a77d2cc69e
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+++ b/doc/news/changes/major/20210506Jean-PaulPelteret
@@ -0,0 +1,4 @@
+New: The step-71 tutorial demonstrates how automatic and symbolic differentiation
+can be leveraged to compute the derivatives of a coupled constitutive law.
+<br>
+(Jean-Paul Pelteret, 2021/05/06)
diff --git a/doc/news/changes/major/20210506Jean-PaulPelteret-2 b/doc/news/changes/major/20210506Jean-PaulPelteret-2
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index 0000000000..241140f3e4
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+++ b/doc/news/changes/major/20210506Jean-PaulPelteret-2
@@ -0,0 +1,6 @@
+New: The step-72 tutorial revisits step-15 (that solves a nonlinear elliptic
+problem using Newton's method). In this variant, automatic differentiation
+is used either to linearize the residual, or to compute the full linear system
+from an energy functional.
+<br>
+(Jean-Paul Pelteret, 2021/05/06)