Y. Saad, Krylov Subspace Methods for Solving Large Unsymmetric Linear Systems, Mathematics of Computation, Vol. 37, No. 155 (Jul., 1981), pp. 105-126 ...

Two weeks ago, a modest-looking paper was uploaded to the arXiv preprint server with the unassuming title On the invariant subspace problem in Hilbert spaces.

Fabrizio Zanello, Partial Derivatives of a Generic Subspace of a Vector Space of Forms: Quotients of Level Algebras of Arbitrary Type, Transactions of the American Mathematical Society, Vol. 359, No.