Alfred Horn (February 17, 1918 – April 16, 2001) was an American mathematician notable for his work in lattice theory and universal algebra.

At this point, the children moved in with their grandparents on the mother's side.

They would later move to Brooklyn where Horn spent most of his childhood, raised by his extended family.

A year later, he started work at the University of California, Los Angeles, where he stayed until his retirement in 1988.

He died in 2001 in Pacific Palisades, Los Angeles after eight years of battling prostate cancer.