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• Richard L. Mendelsohn　　The Philosophy of Gottlob Frege, Cambridge University Press, 2010 (First Published in 2005)
• 加藤久子　　『数の泉　数の成り立ちから実数論へ』、九州大学出版会、2010年

一つ目の本の概要は次の通り。

This analysis of Frege's views on language and metaphysics in 'On Sense and Reference', arguably one of the most important philosophical essays of the past hundred years, provides a thorough introduction to the function/argument analysis and applies Frege's technique to the central notions of predication, identity, existence and truth. Of particular interest is the analysis of the Paradox of Identity and a discussion of three solutions: the little-known Begriffsschrift solution, the sense/reference solution, and Russell's 'On Denoting' solution. Russell's views wend their way through the work, serving as a foil to Frege. Appendices give the proofs of the first 68 propositions of Begriffsschrift in modern notation. This book will be of interest to students and professionals in philosophy and linguistics.

二つ目は、自然数から始めて、有理数、無理数へと順番に説明している本。厳密な、がちがちの本ではなく、ゆるやかに記述している感じです。