fixed typos

[ginac.git] / ginac / clifford.h

diff --git a/ginac/clifford.h b/ginac/clifford.h
index d3109a0cba61cbb7c3211775bd90ef5d08d76cd5..667d7befd9d400749188f8af6f28bcecee1ce83e 100644 (file)
--- a/ginac/clifford.h
+++ b/ginac/clifford.h
@@ -35,7 +35,7 @@ namespace GiNaC {
  *  algebra (the Dirac gamma matrices). These objects only carry Lorentz
  *  indices. Spinor indices are hidden. A representation label (an unsigned
  *  8-bit integer) is used to distinguish elements from different Clifford
- *  algebras (objects with different labels commute). */
+ *  algebras (objects with different labels commutate). */
 class clifford : public indexed
 {
        GINAC_DECLARE_REGISTERED_CLASS(clifford, indexed)
@@ -124,7 +124,7 @@ protected:
 };
 
 
-/** This class represents the Dirac gamma5 object which anticommutes with
+/** This class represents the Dirac gamma5 object which anticommutates with
  *  all other gammas. */
 class diracgamma5 : public tensor
 {
@@ -189,7 +189,7 @@ ex dirac_ONE(unsigned char rl = 0);
 /** Create a Clifford unit object.
  *
  *  @param mu Index (must be of class varidx or a derived class)
- *  @param metr Metric (must be of class tensor or a derived class)
+ *  @param metr Metric (should be of class tensmetric or a derived class, or a symmetric matrix)
  *  @param rl Representation label
  *  @return newly constructed Clifford unit object */
 ex clifford_unit(const ex & mu, const ex & metr, unsigned char rl = 0);
@@ -265,7 +265,7 @@ ex clifford_inverse(const ex & e);
  *
  *  @param v List or vector of coordinates
  *  @param mu Index (must be of class varidx or a derived class)
- *  @param metr Metric (must be of class tensor or a derived class)
+ *  @param metr Metric (should be of class tensmetric or a derived class, or a symmetric matrix)
  *  @param rl Representation label
  *  @return Clifford vector with given components */
 ex lst_to_clifford(const ex & v, const ex & mu,  const ex & metr, unsigned char rl = 0);