diff --git a/books/bookvol10.2.pamphlet b/books/bookvol10.2.pamphlet
index f13d453..5e40e3e 100644
--- a/books/bookvol10.2.pamphlet
+++ b/books/bookvol10.2.pamphlet
@@ -56584,7 +56584,7 @@ MonogenicAlgebra(R:CommutativeRing, UP:UnivariatePolynomialCategory R):
        reduce(map(d, lift x)) + yprime * reduce differentiate lift x
 
      derivationCoordinates(b, d) ==
-       coordinates(map(differentiate(#1, d), b), b)
+       coordinates(map(x +-> differentiate(x, d), b), b)
 
      recip x ==
        (bc := extendedEuclidean(lift x, definingPolynomial(), 1))
diff --git a/changelog b/changelog
index 869ef8d..d205a90 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20090511 tpd src/axiom-website/patches.html 20090511.12.tpd.patch
+20090511 tpd books/bookvol10.2 MONOGEN +-> conversion
 20090511 tpd src/axiom-website/patches.html 20090511.11.tpd.patch
 20090511 tpd books/bookvol10.4 IBACHIN +-> conversion
 20090511 tpd src/axiom-website/patches.html 20090511.10.tpd.patch
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 3f2cea5..7b18d92 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -1236,5 +1236,7 @@ bookvol10.2 FRAMALG +-> conversion<br/>
 bookvol10.3 FPARFRAC +-> conversion<br/>
 <a href="patches/20090511.11.tpd.patch">20090511.11.tpd.patch</a>
 bookvol10.4 IBACHIN +-> conversion<br/>
+<a href="patches/20090511.12.tpd.patch">20090511.12.tpd.patch</a>
+bookvol10.2 MONOGEN +-> conversion<br/>
  </body>
 </html>