The aging of the two brothers in the “twins paradox” is analyzed through the space-time evolution of the densities that correspond to their internal complex structure. Taking into account their relative motion, it is shown that the traveling brother evolves over a shorter interval of time than his twin, which makes him younger than his brother.

[4] Be-ʻinyene ḥodesh Elul ṿe-yeraḥ ha-etanim --.

ḥeleḳ 1. Pirḳe ʻiyun be-gidre mitsṿat ha-biṭaḥon be-mishnato shel Baʻal Ḥovot ha-levavot.

Time stands at the heart of human experience. In this book, new investigations illuminate the gamut of human engagement with time in antiquity.

ḥeleḳ 1. Liḳuṭ ʻinyanim niflaʼim ʻal godel ḳedushat ha-Shabat -- ḥeleḳ 2. Liḳuṭ ʻinyanim niflaʼim ʻal tefilot u-seʻudot Shabat.

Reality imitation and imagination - critical studies.