The convergent method of constructing polynomial discriminant functions for pattern recognition. - Mariusz Flasinski; Grzegorz Lewicki (Pattern Recognit., 1991)

Approximation of functions of finite variation by superpositions of a Sigmoidal function. - Grzegorz Lewicki; Giuseppe Marino 001 (Appl. Math. Lett., 2004)

One-complemented subspaces of Musielak-Orlicz sequence spaces. - James E. Jamison; Anna Kaminska; Grzegorz Lewicki (J. Approx. Theory, 2004)

Codimension-one minimal projections onto Haar subspaces. - Grzegorz Lewicki; Michael Prophet (J. Approx. Theory, 2004)

Chalmers-Metcalf operator and uniqueness of minimal projections. - Grzegorz Lewicki; Leslaw Skrzypek (J. Approx. Theory, 2007)

Equality of two strongly unique minimal projection constants. - Grzegorz Lewicki; Agnieszka Micek (J. Approx. Theory, 2010)

Minimal shape-preserving projections in tensor product spaces. - Grzegorz Lewicki; Michael Prophet (J. Approx. Theory, 2010)

Codimension-one minimal extensions onto Haar subspaces. - Grzegorz Lewicki; Agnieszka Micek (J. Approx. Theory, 2012)

Bernstein's Lethargy Theorem in Fréchet spaces. - Asuman Güven Aksoy; Grzegorz Lewicki (J. Approx. Theory, 2016)

Minimal projections onto hyperplanes in. - Grzegorz Lewicki; Leslaw Skrzypek (J. Approx. Theory, 2016)

Codimension 1 minimal projections onto the lines in Lp. - Grzegorz Lewicki; Michael Prophet (J. Approx. Theory, 2022)

Minimal projections onto subspaces generated by sign-matrices. - Beata Deregowska; Barbara Lewandowska; Grzegorz Lewicki (J. Approx. Theory, 2024)