By Patrick Iglesias-zemmour

**Diffeology** is the 1st textbook at the topic. it really is aimed to graduate scholars and researchers who paintings in differential geometry or in mathematical physics

**Read Online or Download Diffeology PDF**

**Similar differential geometry books**

**Gradient flows in metric spaces and in the space of probability measures**

This booklet is dedicated to a conception of gradient flows in areas which aren't inevitably endowed with a ordinary linear or differentiable constitution. It includes components, the 1st one relating gradient flows in metric areas and the second dedicated to gradient flows within the area of chance measures on a separable Hilbert area, endowed with the Kantorovich-Rubinstein-Wasserstein distance.

**Geometry from Dynamics, Classical and Quantum**

This booklet describes, by utilizing trouble-free innovations, how a few geometrical buildings familiar this day in lots of components of physics, like symplectic, Poisson, Lagrangian, Hermitian, and so on. , emerge from dynamics. it truly is assumed that what may be accessed in real reviews while learning a given approach is simply its dynamical habit that's defined by utilizing a kinfolk of variables ("observables" of the system).

Diffeology is the 1st textbook at the topic. it really is aimed to graduate scholars and researchers who paintings in differential geometry or in mathematical physics

**Degenerate Complex Monge–Ampère Equations**

Advanced Monge–Ampère equations were probably the most robust instruments in Kähler geometry because Aubin and Yau’s classical works, culminating in Yau’s strategy to the Calabi conjecture. A awesome program is the development of Kähler-Einstein metrics on a few compact Kähler manifolds. lately degenerate complicated Monge–Ampère equations were intensively studied, requiring extra complex instruments.

- Hyperspaces: Fundamentals and Recent Advances
- Non-linear Partial Differential Operators and Quantization Procedures: Proceedings of a Workshop held at Clausthal
- Winding Around: The Winding Number in Topology, Geometry, and Analysis
- Symplectic Invariants and Hamiltonian Dynamics

**Extra resources for Diffeology**

**Sample text**

Let f : U → X be a smooth parametrization. Thanks to the axiom D3 (art. 5), the composite f ◦ 1U , where 1U is the identity of U, is a plot of X. Thus D(U, X) ⊂ D(U). Now, let P : U → X be a plot. Thanks again to the axiom D3, for every smooth parametrization F in U, the parametrization P◦F belongs to D. Hence, P is smooth (art. 14). Thus, D(U) ⊂ D(U, X). Therefore, D(U) = D(U, X). 17. Diﬀeomorphisms. Let X and X be two diﬀeological spaces. A map f : X → X is called a diﬀeomorphism if f is bijective and if both f and f−1 are smooth.

11). 2) Check that C∞ (Tα , R) is reduced to the constants, that is, C∞ (Tα , R) R. 3) Let α and β be two irrational numbers. Let f : Tα → Tβ be a smooth map. Show that there exist an interval J of R and some aﬃne map F : J → R, such that πβ ◦ F = f ◦ πα J, use the fact that Z + αZ is dense in R. Then, show that F can be extended to the whole R in an aﬃne map. Deduce that C∞ (Tα , Tβ ) does not reduce to the constant maps if and only if there exist four integers a, b, c and d such that a + βb · α= c + βd 4) Show that Tα and Tβ are diﬀeomorphic if and only if α and β are conjugate modulo GL(2, Z), that is, the four integers a, b, c, d of the question 1) satisfy ad − bc = ±1.

Subductions Subductions are surjections between diﬀeological spaces, identifying the target with the pushforward (art. 43) of the source. They are a categorical key construction, used in particular in the deﬁnition of the diﬀeological quotients (art. 50). 26 1. 7. A subduction. 46. What is a subduction? Let X and X be two diﬀeological spaces, and let f : X → X be some map. The map f is said to be a subduction if it satisﬁes the following conditions: 1. The map f is surjective. 2. The diﬀeology D of X is the pushforward of the diﬀeology D of X, that is, with the notation introduced above, f∗ (D) = D .