Search Loci: Convergence: To the pure geometer the radius of
curvature is an incidental characteristic - like the grin of the
Cheshire cat. To the physicist it is an indispensable
characteristic. It would be going too far to say that to the
physicist the cat is merely incidental to the grin. Physics is
concerned with interrelatedness such as the interrelatedness of
cats and grins. In this case the "cat without a grin" and the
"grin without a cat" are equally set aside as purely
mathematical phantasies. The Expanding Universe.. Solving Euler
Squares of Order Five Euler squares were introduced on the first
day of a problem solving class for mathematics teachers.
Nineteen teachers were placed in collaborative groups and given
a pegboard holding five different geometric shapes in five
different colors (see Figure 4). The author acknowledges ETA
Cuisenaire for providing the six Geo-Shapes Pegboards for her
research. Figure 4: a Geo-Shapes Pegboard Challenged to find a
way to place the pegs so that no shape or colo