I have been running up against a memory limitation when running maple.java v15 from a Linux Ubuntu workstation.  The memory indicator in Maple gets up to 39.36M but will not go above that.  After I reach this limit I am still able to perform further computations but Maple gets slow and eventually crashes.  Here is one of the lines from the error message:

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: GC overhead limit exceeded

I would like to be able to enter an assumption into maple indicating one variable is much greater than another.  I would then like maple to eliminate the smaller variable term when it is added together with the much greater term.  However when I use the >>> symbol in maple along with assuming I get an error. 

> eqn1 := y = a*t+b*t;
                        ...