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In 1970, Phillip Griffiths envisioned that points at infinity could be added to the classifying space D of polarized Hodge structures. In this book, Kazuya Kato and Sampei Usui realize this dream by creating a logarithmic Hodge theory. They use the logarithmic structures begun by Fontaine-Illusie to revive nilpotent orbits as a logarithmic Hodge structure. The book focuses on two principal topics. First, Kato and Usui construct the fine moduli space of polarized logarithmic Hodge structures with additional structures. Even for a Hermitian symmetric domain D, the present theory is a refinement of the toroidal compactifications by Mumford et al. For general D, fine moduli spaces may have slits caused by Griffiths transversality at the boundary and be no longer locally compact. Second, Kato and Usui construct eight enlargements of D and describe their relations by a fundamental diagram, where four of these enlargements live in the Hodge theoretic area and the other four live in the algebra-group theoretic area. These two areas are connected by a continuous map given by the SL(2)-orbit theorem of Cattani-Kaplan-Schmid. This diagram is used for the construction in the first topic.
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My name is Komori, and I'm working in Soul Management section which responsible for sending the soul to the new life. It seems like a very peaceful job at a glance, but there are actually too many troublesome selfish requests from the souls! "The Happiness Street in District Zero" is a reincarnation fantasy that will make you laugh and cry!
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My name is Komori, and I'm working in Soul Management section which responsible for sending the soul to the new life. It seems like a very peaceful job at a glance, but there are actually too many troublesome selfish requests from the souls! "The Happiness Street in District Zero" is a reincarnation fantasy that will make you laugh and cry!
「Web2.0」という単語を耳にしたことのある人は多いだろう。それは市場のルールを大きく変えてしまったと言われ、ビジネスの世界に大きなトレンドを起こしている。Amazon、Google、またSNS(ソーシャル・ネットワーキング・サービス)やブログなどのサービスがその代表格とされている。行政書士かつ、起業コンサルタントである著者は、「ユーザーに作っていただきます」「環境を整えることに力を使います」という2点が「Web2.0」的発想だと言う。小さな会社や個人が「Web2.0」的発想を仕事に活かしてビジネスを成功させている人と、そうでない人の格差が広がっていると言う。本書は、ビジネス弱者が「Web2.0」的発想を有効活用する方法を、成功している企業の実例も交えながら解説する。集合知、性善説、ユーザー参加、破壊的戦略、ロングテール……「Web2.0」を吸収し、弱者が逆転できるのは、今しかない! 【PHP研究所】
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