(linear algebra) An eigenvalue corresponding to the left transform of a given linear operator; i.e. 𝜆! such that urm A=u𝜆!.

(linear algebra) An eigenvalue corresponding to the right transform of a given linear operator; i.e. 𝜆! such that rm Au=𝜆u!.

Able to use either (right or left) hand, often equally well; ambidextrous.

plural of Einstein refrigerator

An absorption refrigerator that has no moving parts, operates at constant pressure, and requires only a heat source to operate.

Einstein refrigerator

A ring-shaped gravitational mirage: an image of a distant light source (such as a galaxy) which has been distorted into a ring by a gravitational lens.

A city in Guipúzcoa, Basque Country, Spain

plural of Einstein-Szilárd refrigerator

The shape or form of an 8 (eight). / (rock climbing, caving) A device for abseiling, so-called for its shape. / A type of knot.