Herbert J. Alexander

Mathematician

Herbert J. Alexander, 58, a mathematician who had served on the faculty of the University of Illinois at Chicago since 1975 and was noted for his solution of several noted mathematics problems, died of lymphoma Aug. 27 in Evanston, Ill. He lived in Wilmette, Ill.

He was known for his contributions to the study of analytic functions of complex variables. Among the problems he solved was the discovery of the polynomial hull of rectifiable curves in the space of several complex variables.

Dr. Alexander, a Cleveland native and a 1963 Harvard University graduate, received his mathematics doctorate from the University of California at Berkeley in 1968.

Before 1975, he had taught at the University of Michigan, the University of California at Los Angeles and UC-San Diego.

Alfredo Kraus

Opera Singer

Alfredo Kraus, 71, a Spanish opera singer who spurned popularity to become one of the world's great lyric tenors, died of pancreatic cancer Sept. 10 at his home in Madrid.

He had a special elegance on stage and a beautiful softness of voice that won him praise in the opera world. The Grove Dictionary of Opera calls him "the best-liked lyric tenor of his generation."

He appeared in opera houses in New York, Vienna and Berlin, performing in such classics as "Rigoletto," "Traviata," "Lucia" and "Werther."

He attributed his longevity on the opera scene to his technique, selective choice of repertoire and good health resulting from regular exercise.

Edward Keonjian

Electrical Engineer

Edward Keonjian, 90, a University of Arizona electrical engineer and early leader in the field of low-power electronics, died Sept. 10 in Tucson. The cause of death was not reported.

In 1954, he designed the world's first solar-powered, pocket-size radio transmitter. That transmitter is now on display at the Smithsonian Institution's Museum of American History.

Dr. Keonjian, an Armenian who received a doctorate in electrical engineering from the Leningrad Institute of Electrical Engineering in 1932, came to this country in 1947.

Mcwayizeni Ka Dinizulu

Zulu Prince

Mcwayizeni Ka Dinizulu, 67, the most senior prince of South Africa's Zulu people and a longtime opponent of the leading Zulu nationalist politician, died Sept. 7 in Johannesburg. The cause of death was not disclosed.

The prince was an uncle and close ally of the Zulu monarch, King Goodwill Zwelithini. Prince Mcwayizeni served as regent before Zwelithini was crowned king in 1971, and he remained highly influential until 1994, when South Africa elected its first democratic government.

The prince's support for the African National Congress made him many enemies among the Zulus, the majority of whom support the nationalist Inkatha Freedom Party led by Chief Mangosuthu Buthelezi. There have been several reports of attempts on Prince Mcwayizeni's life since he joined the ANC in 1990.

August Stephen Cinquegrana

California Filmmaker

August Stephen Cinquegrana, 58, a San Francisco filmmaker who won an American Film Institute Independent Filmmaker's Award in 1977 and who also had been nominated for an Academy Award, died of cancer Aug. 16 in San Francisco.

He received his Oscar nomination, for best short documentary, for "Goodnight, Miss Ann," a documentary about Los Angeles boxing clubs.

He worked closely with director Francis Ford Coppola at Zoetrope Studios and directed several documentaries for PBS and HBO.

His last documentary, "The Digital Divide," which discusses the social consequences of the computer revolution, will be broadcast on PBS in January.

Birgit Cullberg

Dancer and Choreographer

Birgit Cullberg, 91, a dancer and choreographer who founded Sweden's noted Cullberg Ballet company, died Sept. 8 in Stockholm. The cause of death was not disclosed.

As a choreographer, she first attracted wide attention with "Miss Julie," a ballet based on the disturbing sexual drama by Swedish playwright August Strindberg. The ballet had its world premiere in Sweden in 1950.

Ms. Cullberg, who found inspiration in animals and often incorporated their movements in her choreography, founded the Cullberg Ballet in 1967. It is part of the Swedish National Touring Theatre.

Tony Duquette

Interior Decorator

Tony Duquette, 85, a Los Angeles designer and interior decorator to the wealthy whose 18-karat gold jewelry currently is featured at Neiman Marcus and Bergdorf Goodman, died Sept. 9 at a hospital in Los Angeles after a heart attack.

His career included from designing sets and costumes for Fred Astaire musicals and creating rooms for clients such as the late J. Paul Getty, the Duchess of Windsor, cosmetics maker Elizabeth Arden and "Gone With the Wind" producer David O. Selznick.