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simplex

  

pivoteqn

  

returns a sublist of equations given a pivot

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

pivoteqn(C, var)

Parameters

C

-

set of linear equations

var

-

variable chosen to carry out a pivot operation

Description

• 

The function pivoteqn(C, var) returns a sublist of equations from C. Each equation eq returned achieves the minimum non-negative ratio of

ctermeqcoeffeq,var,1

• 

In the special case where all ratios are negative, the function returns FAIL.

• 

The linear equations C are in the special form produced by simplex[setup].

• 

The command with(simplex,pivoteqn) allows the use of the abbreviated form of this command.

Examples

withsimplex:

pivoteqn_SL1=54x3y,_SL2=43x4y,x

_SL1=54x3y

(1)

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