Exotic Smoothness and Quantum Gravity

Understand

Since the first work on exotic smoothness in physics, it was folklore to assume a direct influence of exotic smoothness to quantum gravity.

• Thus, the negative result of Duston (arXiv:0911.4068) was a surprise.
• A closer look into the semi-classical approach uncovered the implicit assumption of a close connection between geometry and smoothness structure.
• But both structures, geometry and smoothness, are independent of each other.