Letter to the Editor

By way of clarification I report that Theorems 4 and 5 from my article “On the Functional Separability of Boolean Functions” (DAN, vol. 94, No. 5, 1954) and Theorem 7 from my article “Toward the Study of Symmetric Boolean Functions from the Point of View of the Theory of Relay-Contact Circuits” (DAN, vol. 104, No. 2, 1955) should be read with the words “except 0 and 1” prefixed to them. In consequence 2 of Theorem 6, formulated in the latter of the named articles (p. 185), where (2^{n+1}\cdot n) is printed, it should read (2_n \cdot n).