Z See SET THEORY.

Zabarella Jacopo (1532–89), Italian Aristotelian philosopher who taught at the University...

Zarathustra See NIETZSCHE, ZOROASTRIANISM.

ZC See SET THEORY.

Zeigarnik effect the selective recall of uncompleted tasks in comparison to completed...

Zen See BUDDHISM.

Zeno of Citium See STOICISM.

Zeno of Elea See PRE-SOCRATICS.

Zeno’s paradoxes four paradoxes relating to space and motion attributed to Zeno...

Zeno the Stoic See STOICISM.

Zermelo See QUINE, SET THEORY.

zero-sum game See GAME THEORY.

ZF See SET THEORY.

ZFC See INDEPENDENCE RESULTS.

Zohar See CABALA.

Zorn’s lemma See SET THEORY.

Zoroaster See ZOROASTRIANISM.

Zoroastrianism the national religion of ancient Iran. Zoroastrianism suffered a steep...