Icons for MathML constructions

Here is the list of icons made presently (severals of them correspond to 
a MathML content tag) :

MATHML_arg.png                   MATHML_over4.png
MATHML_Bmath.png                 MATHML_overarrow.png
MATHML_cartesianproduct.png      MATHML_overhat.png
MATHML_ceiling.png               MATHML_over.png
MATHML_complexcartesian.png      MATHML_overunder.png
MATHML_complexpolar.png          MATHML_piecewise.png
MATHML_determinant.png           MATHML_powerset.png
MATHML_diagonalintersection.png  MATHML_produnderover.png
MATHML_doublestroke.png          MATHML_produnder.png
MATHML_factorial.png             MATHML_prsubset.png
MATHML_factorof.png              MATHML_real.png
MATHML_fence.png                 MATHML_rem.png
MATHML_floor.png                 MATHML_root.png
MATHML_frac.png                  MATHML_setdiff.png
MATHML_imaginary.png             MATHML_setextension.png
MATHML_in.png                    MATHML_setseparation.png
MATHML_intdomain.png             MATHML_setsymdiff.png
MATHML_intersect.png             MATHML_sqrt.png
MATHML_intersectunder.png        MATHML_sub.png
MATHML_int.png                   MATHML_subset.png
MATHML_intundefined.png          MATHML_subsup.png
MATHML_lim.png                   MATHML_sum.png
MATHML_limtendsto.png            MATHML_sumunder.png
MATHML_map.png                   MATHML_sup.png
MATHML_matrix2.png               MATHML_tendsto.png
MATHML_matrix.png                MATHML_tendstotendsto.png
MATHML_mscript.png               MATHML_under.png
MATHML_notin.png                 MATHML_union.png
MATHML_notsubset.png             MATHML_unionunder.png
MATHML_over2.png                 MATHML_vector.png
MATHML_over3.png

Fred