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ExampleSystems :: chemequ

chemequ -- chemical equilibrium of hydrocarbon combustion

Synopsis

Description

This system was solved in May 2020, using solveSystem in Macaulay2 v1.15 with an Intel(R) Core(TM) i5-4258U CPU at 2.40GHz.

There were 6 solutions found in 1.24877 seconds (with a Bezout bound of 108).

Reference: Keith Meintjes and Alexander P. Morgan, "Chemical equilibrium systems as numerical test problems", ACM Toms, Vol 16, No 2, 143-151, 1990.

See also: http://homepages.math.uic.edu/~jan/Demo/chemequ.html

i1 : chemequ(CC_53)

                          2                      2                  
o1 = {y y  + y  - 3y , y y  + 2y y  + .000001923y  + .00054518y y  +
       1 2    1     5   2 3     1 2              2             2 3  
     ------------------------------------------------------------------------
                                                   2                        2
     .000034074y y  + y  + 4.4975e-7y  - 10y , 2y y  + .00054518y y  + .386y 
                2 4    1             2      5    2 3             2 3        3
     ------------------------------------------------------------------------
                                             2            2         
     + .00041062y  - 8y , .000034074y y  + 2y  - 40y , y y  + y y  +
                 3     5             2 4     4      5   2 3    1 2  
     ------------------------------------------------------------------------
              2                        2                     2
     9.615e-7y  + .00054518y y  + .193y  + .000034074y y  + y  + y  +
              2             2 3        3              2 4    4    1  
     ------------------------------------------------------------------------
     4.4975e-7y  + .00041062y  - 1}
               2             3

o1 : List

Ways to use chemequ :

For the programmer

The object chemequ is a method function.