U.S. President-elect George Bush assured delegates at the superpower arms talks Tuesday that he is "fully committed" to 50 percent cuts in strategic nuclear weapons and an agreement on space defense systems.

Bush conveyed his pledge via U.S. chief delegate Max M. Kampelman at a final plenary meeting before negotiations adjourned until early next year when the new administration takes office in Washington.The negotiations center on long-range nuclear arms and space defense after last December's accord eliminating ground-based medium and shorter-range nuclear missiles.

A precise resumption date as well as outstanding issues, officials said, will certainly be discussed when Soviet leader Mikhail Gorbachev meets Bush during an early December trip to the U.N. in New York.

Kampelman said there had been "major progress" in the far more ambitious Strategic Arms Reduction Talks (START) and "some progress, limited but real" on space defense. But "major disagreements remain."

When the 11th round opens, "the United States will have a new president giving direction to its delegation here," Kampelman said in a statement between the plenary meeting and a farewell luncheon hosted by the Soviets.