if {![package vsatisfies [package provide Tcl] 8.2]} {return}
package ifneeded math 1.2.1 [list source [file join $dir math.tcl]]
package ifneeded math::geometry 1.0.1 [list source [file join $dir geometry.tcl]]
package ifneeded math::calculus 0.5   [list source [file join $dir calculus.tcl]]
package ifneeded math::fuzzy    0.1   [list source [file join $dir fuzzy.tcl]]
