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hello how to draw a precedence graph first of all what is it for with the precedence graph we want to show if transactions are conflict serializable or not conflict serializable firstly first lets talk about the notation t1 is transaction number 1 and T 2 is transaction number 2 and R 1 a is a read operation on the field a in the transaction 1 and write 2 a is a write operation and sorry W 2 a is a write operation on field a in transaction to commit is a commit next lets talk about the rules when do we have to draw the arrows we have to draw an arrow when theres a read operation on field a and it is followed by a write operation in another transaction on the same field or when we have a write operation in transaction 1 on field a and it is followed by a read operation in transaction to sorry in transaction 2 on the same field or when we have a write operation in transaction 1 and it is followed by a bright transaction in sorry write operation in transaction 2 and we have one last c