* Bumped version number.

PacletInfo.m

@@ -4,7 +4,7 @@
 
 Paclet[
     Name -> "xTras",
-    Version -> "1.4.1",
+    Version -> "1.4.2",
     MathematicaVersion -> "6+",
     Description -> "Field theory inspired additions to xAct",
     Creator -> "Teake Nutma",

xAct/xTras/Interface.m

@@ -254,6 +254,12 @@ contains constants (i.e. constant symbols and integers, fractions, etc), and \
 \*StyleBox[\"g\", \"TI\"]] returns True if the vector  \*StyleBox[\"v\", \
 \"TI\"]\(\(\\ is defined as a Killing vector of the metric \
 \)\)\*StyleBox[\"g\", \"TI\"], and False otherwise. \), DisplayForm]\)"; 
+KretschmannToRiemann::usage = "\!\(\*TagBox[\(KretschmannToRiemann[ \
+\*StyleBox[\"expr\", \"TI\"]] converts Kretschmann scalars in  \
+\*StyleBox[\"expr\", \"TI\"]\(\(\\ to Riemann tensors.\)\)\[LineSeparator] \
+KretschmannToRiemann[ \*StyleBox[\"expr\", \"TI\"],  \*StyleBox[\"cd\", \
+\"TI\"]] only converts curvature tensors of the covariant derivative  \
+\*StyleBox[\"cd\", \"TI\"] .\), DisplayForm]\)"; 
 LevelSpecQ::usage = "\!\(\*TagBox[\(LevelSpecQ[ \*StyleBox[\"levelspec\", \
 \"TI\"]] yields True if  \*StyleBox[\"levelspec\", \"TI\"]\(\(\\ is a valid \
 levelspec, and False otherwise.\)\)\), DisplayForm]\)"; 
@@ -357,6 +363,12 @@ contains constants (i.e. constant symbols and integers, fractions, etc), and \
 \*StyleBox[\"expr\", \"TI\"], \*StyleBox[\"cd\", \"TI\"]] converts only Ricci \
 tensors of the covariant derivative  \*StyleBox[\"cd\", \"TI\"] .\), \
 DisplayForm]\)"; 
+RicciToRiemann::usage = "\!\(\*TagBox[\(RicciToRiemann[ \*StyleBox[\"expr\", \
+\"TI\"]] converts Ricci tensors and scalars in  \*StyleBox[\"expr\", \
+\"TI\"]\(\(\\ to Riemann tensors.\)\)\[LineSeparator] RicciToRiemann[ \
+\*StyleBox[\"expr\", \"TI\"],  \*StyleBox[\"cd\", \"TI\"]] only converts \
+curvature tensors of the covariant derivative  \*StyleBox[\"cd\", \"TI\"] \
+.\), DisplayForm]\)"; 
 RicciToSchoutenCC::usage = "\!\(\*TagBox[\(RicciToSchoutenCC[ \
 \*StyleBox[\"K\", \"TI\"]][ \*StyleBox[\"expr\", \"TI\"]] converts all Ricci \
 tensors of in  \*StyleBox[\"expr\", \"TI\"]\(\(\\ to cosmological Schouten \
@@ -533,17 +545,16 @@ contains constants (i.e. constant symbols and integers, fractions, etc), and \
 \"TI\"]] converts a valid  \*StyleBox[\"levelspec\", \"TI\"]\(\(\\ into the \
 {m,n} format.\)\)\), DisplayForm]\)"; 
 ToRicci::usage = "\!\(\*TagBox[\(ToRicci[ \*StyleBox[\"expr\", \"TI\"]] \
-converts all curvature tensors of rank two in  \*StyleBox[\"expr\", \
-\"TI\"]\(\(\\ to Ricci tensors and scalars. \)\)\[LineSeparator] ToRicci[ \
-\*StyleBox[\"expr\", \"TI\"],  \*StyleBox[\"cd\", \"TI\"]] converts only for \
-curvature tensors of the covariant derivative  \*StyleBox[\"cd\", \"TI\"] \
-.\), DisplayForm]\)"; 
+converts all curvature tensors of rank two and contracted Riemann tensors in  \
+\*StyleBox[\"expr\", \"TI\"]\(\(\\ to Ricci tensors and scalars. \
+\)\)\[LineSeparator] ToRicci[ \*StyleBox[\"expr\", \"TI\"],  \
+\*StyleBox[\"cd\", \"TI\"]] converts only for curvature tensors of the \
+covariant derivative  \*StyleBox[\"cd\", \"TI\"] .\), DisplayForm]\)"; 
 ToRiemann::usage = "\!\(\*TagBox[\(ToRiemann[ \*StyleBox[\"expr\", \"TI\"]] \
-converts Weyl tensors, symmetrized Riemann tensors, and gradients of \
-Christoffel symbols to Riemann tensors. \[LineSeparator] ToRiemann[ \
-\*StyleBox[\"expr\", \"TI\"],  \*StyleBox[\"cd\", \"TI\"]] only converts \
-curvature tensors of the covariant derivative  \*StyleBox[\"cd\", \"TI\"] \
-.\), DisplayForm]\)"; 
+converts as many curvature tensors to Riemann tensors as possible. \
+\[LineSeparator] ToRiemann[ \*StyleBox[\"expr\", \"TI\"],  \*StyleBox[\"cd\", \
+\"TI\"]] only converts curvature tensors of the covariant derivative  \
+\*StyleBox[\"cd\", \"TI\"] .\), DisplayForm]\)"; 
 UncontractedIndices::usage = "UncontractedIndices is an option for \
 AllContractions which specifies how many indices should not be contracted."; 
 UnitConstant::usage = 

xAct/xTras/Kernel/init.m

@@ -20,7 +20,7 @@
 (*                   *)
 (*********************)
 
-xAct`xTras`$Version = {"1.4.1", {2014, 10, 7}};
+xAct`xTras`$Version = {"1.4.2", {2014, 10, 30}};
 xAct`xTras`$xTensorVersionExpected = {"1.1.1", {2014, 9, 6}};
 xAct`xTras`$SymManipulatorVersionExpected = {"0.8.5", {2013, 4, 13}};
 xAct`xTras`$MathematicaVersionNeeded = 6.;

xAct/xTras/xTras.History

@@ -1,6 +1,14 @@
 xTras changelog
 ===============
 
+v1.4.2, 2014-10-30
+------------------
+
+  * Added RicciToRiemann.
+  * Added KretschmannToRiemann.
+  * ToRiemann also converts rank-2 curature tensors if the curvature relations are not enabled.
+  * ToRicci also converts contractions of Riemann tensors to Ricci tensors even if the curvature relations are not enabled.
+
 v1.4.1, 2014-10-07
 ------------------