Update app.py

app.py

@@ -663,6 +663,9 @@ def check_and_resolve_discrepancy(initial_response, sympy_output):
     Returns tuple of (resolution_text, has_discrepancy, revised_solution)
     """
     has_discrepancy = False #Initialize
+    resolution_text = ""
+    revised_solution = None
+
     try:
         resolution_prompt = f"""Here is a mathematics question with two answers.
         The first, called Original solution, is a complete solution.