1 Table of Contents: “... -- Are Quarks and Leptons Composite? -- Kaluza-Klein Theory and the Positive Energy Theorem -- Recent Results...”

2 Table of Contents: “...The positive energy theorem and its extensions -- Mass and angular momentum at the quasi-local...”

3 “.... The final chapter of this part contains Witten's proof of the positive energy theorem. The book addresses...”

4 “... proof of the positive energy theorem, which is presented in detail, together with the required tools...”

5 Table of Contents: “... of neutral 4-manifolds and light-like surfaces(Ando) -- Positive Energy Theorems in Fourth-Order Gravity...”

6 Table of Contents: “.... Introduction -- 2. Model of Gravitational Collapse -- 3. Positive Energy Theorems -- 4. Hawking Effect -- 5...”