Theta Invariants of Euclidean Lattices and Infinite-Dimensional Hermitian Vector Bundles over Arithmetic Curves

“The Preface and the Introduction give an extremely well-done overview of the contents of the book, meant for a wide scope of readers. … What results is a carefully written very readable text.” (Rolf Berndt, Mathematical Reviews, April, 2022)“The monograph presents its interesting subject in a highly insightful, lucid, and accessible fashion; it will therefore be relevant to anyone with an interest in Arakelov geometry. While its results are technical, they are motivated, described and proved as clearly as can be.” (Jeroen Sijsling, zbMATH 1471.11002, 2021)

• Introduction.- Hermitian vector bundles over arithmetic curves.- θ-Invariants of Hermitian vector bundles over arithmetic curves.- Geometry of numbers and θ-invariants.- Countably generated projective modules and linearly compact Tate spaces over Dedekind rings.- Ind- and pro-Hermitian vector bundles over arithmetic curves.- θ-Invariants of infinite dimensional Hermitian vector bundles: denitions and first properties.- Summable projective systems of Hermitian vector bundles and niteness of θ-invariants.- Exact sequences of infinite dimensional Hermitian vector bundles and subadditivity of their θ-invariants.- Infinite dimensional vector bundles over smooth projective curves.- Epilogue: formal-analytic arithmetic surfaces and algebraization.- Appendix A. Large deviations and Cramér's theorem.- Appendix B. Non-complete discrete valuation rings and continuity of linear forms on prodiscrete modules.- Appendix C. Measures on countable sets and their projective limits.- Appendix D. Exact categories.- Appendix E. Upper bounds on the dimension of spaces of holomorphic sections of line bundles over compact complex manifolds.- Appendix F. John ellipsoids and finite dimensional normed spaces.