Game Theory and Graph theory for Financial engineering/quantitative finance

Dear experts,
I am preparing for Financial Engineering.
I recently came across one particular discussion that Game Theory and Graph theory from Batchelor’s level mathematics is required for Financial Engineering.

I am currently taking guidance from a Phd Student. He went through the below books and did not come across these two topics- Game Theory and Graph theory


1. Solutions Manual - A Linear Algebra Primer for Financial Engineering... $40.00
Qty: 1
Sold By: Amazon.com Services, Inc.
 
2. A Linear Algebra Primer for Financial Engineering: Covariance... $62.00
Qty: 1
Sold By: Amazon.com Services, Inc.
 
3. Solutions Manual - A Primer For The Mathematics Of Financial... $40.00
Qty: 1
Sold By: Amazon.com Services, Inc.
 
4. A Primer For The Mathematics Of Financial Engineering, Second Edition... $54.43


Stochastic Calculus by Steven Shreve: book 1
https://www.amazon.com/Stochastic-Calculus-Finance-Binomial-Springer/dp/0387249680/ref=sr_1_1?crid=YCDXWOSM5YBB&keywords=stochastic+calculus+for+finance+i&qid=1553153578&s=gateway&sprefix=stochastic+calculus%2Caps%2C676&sr=8-1


Stochastic Calculus by Steven Shreve: book 2
https://www.amazon.com/Stochastic-Calculus-Finance-II-Continuous-Time/dp/144192311X/ref=sr_1_1?keywords=steven+shreve&qid=1553153123&s=gateway&sr=8-1


Can someone kindly guide me if these two topics (Game Theory and Graph theory) are relevant for financial engineering.

Thank you