n = 100
A2 = sparse.diags([1], [-1], shape=(n, n), format='csr')
A2[0, :] = 1

e710baca7f21772d970fca46b1b6a937b9f96536
<mask token>

n = 100
A2 = sparse.diags([1], [-1], shape=(n, n), format='csr')
A2[0, :] = 1
