What specific area did mathematicians often focus on first when initially reviewing Zhang's work related to the RH?
Answer
His arguments concerning the Landau–Siegel zeroes.
Mathematicians quickly worked to verify Zhang's claims by often starting by focusing on whether his arguments concerning the Landau–Siegel zeroes were sound, due to their deep linkage to the RH.

Related Questions
What finite gap bound did Yitang Zhang prove exists infinitely often between prime numbers in 2013?What characteristic defines the location of the non-trivial zeros according to the Riemann Hypothesis?If the Riemann Hypothesis were proven true, what immediate effect would it have on other number theory problems?What is the current official consensus regarding Yitang Zhang's full proof of the Riemann Hypothesis?What difficult problem is deeply connected to the RH, such that ruling out its specific zeros is equivalent to proving a version of the RH concerning number fields?How does Zhang's established 2013 success differ in scope from the Riemann Hypothesis?Why is the verification process for claims like solving the RH deliberately slow?What financial reward is associated with providing a verified proof of the Riemann Hypothesis?What specific area did mathematicians often focus on first when initially reviewing Zhang's work related to the RH?What specific achievement regarding Zhang's recent RH work has been confirmed by experts?