self doubt

Question

In this answer, how is the number of conflict equivalent schedule equal to T1->T2 equal to 1(How is it being calculated). And how is the number of conflict equivalent schedule equal to T2->T1 being calculated??It is very confusing please Help!!!!!

Comments

This might be completely wrong and foolish!!! But I want to understand the concept properly.

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first point is :- in a transaction, all operations sequence should be preserved !

So, r2(Z) should be after W2(y) and W2(Y) should be after R2(y)

Now check howmany schedules you are getting

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Ok, So there will be 1 schedule for T1->T2, but can't understand what you have done for T2->T1....