Family Theories

A handsome watch with attractive dark hues, by Emporio Armani. Black croc-embossed patent leather strap and round stainless steel case. Black dial with silvertone stick indices, logo and date window. Quartz movement. Water resistant to 50 meters. Two-year limited warranty.

Precise Swiss-quartz movement

World Time Indication (24 Time Zones) with date Complication

Beautiful Guilloche Designed dial - perfect watch for the traveler

Krysterna scratch resistant crystal

Water-resistant to 165 feet (50 M)

Link representations - Manipulate the properties of one and observe instant updates to others without switching screens

Includes an easy-glide Touchpad that works more like a computer with a mouse

Explore individual representations, one at a time, or as many as four on the same screen

See multiple representations of a single problem - algebraic, graphical, geometric, numeric and written

Grab a graphed function and move it to see t ...