Lotfi Zadeh

Lotfi Asker Zadeh (born February 4, 1921) is a mathemtician and computer scientist, and a professor of computer science at the University of California at Berkeley. He was in Baku, Azerbaijan as Lotfi Aliaskerzadeh (or Aliaskarzadeh), to a Russian mother and Azeri father of Iranian origin, grew up in Iran, studied at Alborz High School and Tehran University, and moved to the United States in 1944. He has taught at Berkeley since 1959. He published his seminal work on fuzzy set in 1965 in which he detailed the mathematics of fuzzy set theory. In 1973 he proposed his theory of fuzzy logic.

Related Topics:
February 4 - 1921 - Computer science - University of California at Berkeley - Baku - Azerbaijan - Azeri - Iran - Alborz High School - Tehran University - United States - 1944 - Berkeley - 1959 - Fuzzy set - Fuzzy logic

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Lotfi Zadeh is noted to, "quick(ly) shrug off nationalism, insisting there are much deeper issues in life", where he himself is quoted stating, "The question really isn't whether I'm American, Russian, Iranian, Azerbaijani, or anything else, I've been shaped by all these people and cultures and I feel quite comfortable among all of them." {{ref|AzerInt}}

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Aristotle introduced the laws of thought which consisted of three fundamental laws:

Related Topics:
Aristotle - Laws of thought

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

• principle of identity
• law of the excluded middle
• law of contradiction

The law of the excluded middle states that for all propositions p, either p or ~p must be true, there being no middle true proposition between them. In other words, p cannot be both p and not p. This should not be confused with the principle of bivalence, which states that either p must be true or false.

Related Topics:
Law of the excluded middle - Principle of bivalence

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Plato laid the foundation of what is now known as fuzzy logic indicating that there was a third region beyond true and false.

Related Topics:
Plato - Fuzzy logic

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

It was Jan Łukasiewicz who first proposed a systematic alternative to the bi-valued logic

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

of Aristotle and described the 3-valued logic, with the third value being Possible.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Lotfi Zadeh, in his theory of fuzzy logic, proposed the making of the membership function operate over the range of real numbers . He proposed new operations for the calculus of logic and showed that fuzzy logic was a generalisation of classical logic.

Related Topics:
Real numbers - Logic - Fuzzy logic

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Lotfi Zadeh is also credited, along with John R. Ragazzini, in 1952, to have pioneered the development of the z-transform method in discrete time signal processing and analysis. These methods are now standard in digital signal processing, digital control, and other discrete-time systems used in industry and research.

Related Topics:
John R. Ragazzini - Z-transform - Digital signal processing - Digital control

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Lotfi Zadeh's latest work includes computing with words and perceptions.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

 
Lotfi Zadeh: References ►