Lobachevski illuminated

Lobachevski Illuminated provides an historical introduction to non-Euclidean geometry. Within its pages, readers will be guided step-by-step through a new translation of Lobachevski's groundbreaking book, The Theory of Parallels. Extensive commentary situates Lobachevski#x92;s work in its mathematical, historical, and philosophical context, thus granting readers a vision of the mysterious and beautiful world of non-Euclidean geometry as seen through the eyes of one of its discoverers. Although Lobachevski#x92;s 170-year old text is challenging to read on its own, Seth Braver#x92;s carefully arranged 'illuminations' render this classic accessible to any modern reader (student, professional, or layman) undaunted by high school mathematics.

Title from publisher's bibliographic system (viewed on 02 Oct 2015).

Lobachevski's introduction -- Preliminary Theorems (1-15) -- Theory of Parallels 16: The definition of parallelism -- Theory of Parallels 17: Parallelism is well-defined -- Theory of Parallels 18: Parallelism is symmetric -- Theory of Parallels 19: The Saccheri-Legendre Theorem -- Theory of Parallels 20: The Three Musketeers Theorem -- Theory of Parallels 21: A little Lemma -- Theory of Parallels 22: Common perpendiculars -- Theory of Parallels 23: The [pi]-function -- Theory of Parallels 24: Convergence of parallels -- Theory of Parallels 25: Parallelism is transitive -- Theory of Parallels 26: Spherical triangles -- Theory of Parallels 27: Solid angles -- Theory of Parallels 28: The prism theorem -- Theory of Parallels 29: Circumcircles or lack thereof (Part I) -- Theory of Parallels 30: Circumcircles or lack thereof (Part II) -- Theory of Parallels 31: The horocycle defined -- Theory of Parallels 32: The horocycle as a limit-circle -- Theory of Parallels 33: Concentric horocycles -- Theory of Parallels 34: The horosphere -- Theory of Parallels 35: Spherical trigonometry -- Theory of Parallels 36: The fundamental formula -- Theory of Parallels 37: Plane trigonometry -- Appendix:…