In his autobiography, Abraham Halevi Fraenkel describes growing up as an Orthodox Jew in Germany and his development as a mathematician at the beginning of the twentieth century. In his memoir, originally published in German in 1967, Fraenkel painted a unique picture of the complexity of Jewish life in Germany with special emphasis on the developments in the Orthodox community. He described the world of mathematics in Germany in the first half of the twentieth century, in the context of the great mathematicians he met, many of whom were Jews or had Jewish roots. In his personal life, Fraenkel merged the worlds of orthodox Judaism, liberal Zionism and mathematics, in a period of global and national upheavals, which included the two World Wars and the establishment of the State of Israel. The last chapter of the book, which describes his extensive public activity in Israel from the 1930s until his death in 1965, was written by Prof. Jiska Cohen-Mansfield. Introductions were added by Prof. Yehoshua Bar-Hillel and Prof. Menachem Magidor, the former president of the Hebrew University.

Modern Investment Theory is the only book published in Hebrew on this central topic for students and practitioners of business and economy. The book opens with a review of the investment environment and the structure and institutions of the Israeli capital market, as well as a description of the assets traded in the equity, debt, and derivative markets. Since Israel is a small economy, its interactions with global financial markets is highlighted. The core concepts are presented by order of their evolution and contribution to the field: from rational and behavioral decision-making in states of risk, to Portfolio Theory, the CAPM, and advanced theoretical and empirical models, including five-factor models. Three chapters are devoted to fixed income pricing and risk, and two chapters address derivative assets and their pricing. Some of the chapters introduce for the first time in Hebrew financial crises and their impact on the real economy and on society, private capital, behavioral finance, and international finance. Many of the concepts of modern investment theory were developed by prominent researchers; some won Nobel or other prestigious prizes. To sixteen of these outstanding researchers, seven of whom are Israeli, I devote special boxes entitled "Figures from the Hall of Fame," highlighting their contribution to the field. Pedagogically, the book follows the American model where each chapter is accompanied by a Powerpoint presentation file, the chapter is briefly summarized, has a list of key terms, and between twenty to forty questions. Teachers can access all chapter solutions.

Graph Theory is, as far as we know, the first to be written by this approach. Its initial purpose was to serve as a high-school textbook for students learning graph theory in a systematic and orderly manner. Until the publication of this book, graph theory was only taught in academic institutions. The book soon began to serve as a reference book and even as a textbook in colleges and academic institutes for lecturers and students of mathematics and computer science. The book in its current format includes five chapters: 1. Definitions, Examples and Basic Concepts; 2. Paths and Circuits in Graphs; 3. Trees 4. Networks 5. Games, Puzzles and Graph Theory. The intention is to release it in a new and expanded edition.

This course book features a systematic method of presenting the foundations of modern algebra, focusing on three main theories: groups, rings, and fields. It contains numerous exercises.

Tests from 2009.