Math 262

Problem set 3, due Wednesday, February 4

Do the following problems from the book:

Also, try to make some progress on the following, but don't hand it in: what can you find out about inverses of upper triangular matrices? (An n × n matrix A is upper triangular if every entry Aij is zero when i > j. In other words, it has all zeros below the main diagonal.) For example, can you find nice formulas in the 2 × 2 case, or the 3 × 3 case? What if all of the entries on the diagonal are 1? We will discuss your ideas in class on Wednesday, or maybe Friday.
Questions or comments? Email me at John.H.Palmieri.2@nd.edu.

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John H. Palmieri, Department of Mathematics, University of Notre Dame, John.H.Palmieri.2@nd.edu