: specifies whether or not the event functions have been redefined. ALTERG
need not be set if
. On subsequent calls to D02QWF, if NEQG
has been set positive, then
specifies that the event functions remain unchanged, whereas
specifies that the event functions have changed. Because of the expense in reinitializing the root searching procedure, ALTERG
should be set to .TRUE. only if the event functions really have been altered. ALTERG
need not be set if the root-finding option is not used.