Substituting above two equations in 21 and 22 and solving we get the FINAL EQUATIONS,
------eq. I
------eq. II
------eq. III
------eq. IV
If in equation II we assume denominator = 0, then,
But, if numerator ≠ 0 then, it represents undefined state of stress at each point in a medium.
So, to have finite state of stress, numerator = 0, then,
i.e. it has number of values which satisfies the condition,
