Heegner points, stark-Heegner points, and diagonal classes

This Volume Comprises Four Interrelated Articles Whose Unifying Theme Is The Study Of Heegner And Stark-heegner Points, And Their Connections With The Padic Logarithm Of Certain Global Cohomology Classes Attached To A Pair Of Weight One Theta Series Of A Common (imaginary Or Real) Quadratic Field. These Global Classes Are Obtained From P-adic Deformations Of Diagonal Classes Attached To Triples Of Modular Forms Of Weight > 1, And Naturally Generalise A Construction Of Kato Which One Recovers When The Two Theta Series Are Replaced By Eisenstein Series Of Weight One. Understanding The Extent To Which Such Classes Obtained Via The P-adic Interpolation Of Motivic Cohomology Classes Are Themselves Motivic Is A Key Motivation For This Study. A Second Is The Desire To Show That Stark-heegner Points, Whose Global Nature Is Still Poorly Understood Theoretically, Arise From Classes In Global Galois Cohomology. -- English Abstract From Page [iii]