display
  Q1 for illustrating the influences of various factors when the
  default selref=T is selected. The process is transient.
 
  A single cell has a uniform source of C1.
 
  Heavy linear under-relaxation is used so as to necessitate many
  sweeps for convergence.
 
  Neither the solution nor the number of sweeps is influenced by
  XULAST, YVLAST, ZWLAST, TLAST OR RHO1.
 
  Both are influenced by: RESFAC, FIINIT(C1) and the relaxation
  factor.
 
  enddis
#pause
  enddis
TEXT(Influences On Convergence; Transient
 
STEADY=F; SOLVE(C1)
PATCH(SOURCE,PHASEM,1,1,1,1,1,1,1,1)
 
  The larger is the absolute magnitude of the following quantity
  the smaller will be the number of iterations, and therefore the
  accuracy of the solution.
FIINIT(C1)=10
 
  Changing either of the next two statements will change the
  (un-converged) solution
 
RELAX(C1,LINRLX,0.01); RESFAC=0.01
  Changing any of the next five statements will have no effect
  on the solution
 zwlast=100; yvlast=10; xulast=1/10; tlast= 1/100; rho1=.0001
 
COVAL(SOURCE,C1,FIXFLU,1/TLAST)
LSWEEP=1000; TSTSWP=10; NPLT=10; ORSIZ=0.2