A November 1979 Moscow protocol, signed by Vinogradov and Olech, records Vinogradov and Pontryagin accusing IMU consultative committees of being influenced by 'Zionist' propaganda

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Olli Lehto's Chapter 10.1 ("The IMU and the Soviet National Committee") documents a November 1979 negotiation in Moscow, opened when Czesław Olech — chairman of the Warsaw Congress Organizing Committee — travelled there on an unofficial invitation. His first discussions with Ivan Vinogradov and Lev Pontryagin "led nowhere." The resulting protocol of the negotiations, "signed by Vinogradov and Olech," ran to six points; the first records that "Vinogradov and Pontryagin noted that the Consultative Committees have systematically discriminated against Soviet candidates," and that in this behaviour "an important role was played by the openly racist propaganda of the Zionists, widely advertised by the Western press" (Mathematics Without Borders, p. 215).

The signature is Vinogradov's, not Pontryagin's — Olech signed as the Polish counterparty to the negotiation, not as an endorser of its content. What the document establishes is therefore narrower than a joint signature but still substantial: antisemitic-conspiracy language entered a signed institutional record of an IMU negotiation, attributed there to two named Soviet officials, independently of Sergei Novikov's later personal recollection. Lehto's own verdict on the episode is the same shape — the conflict "was due largely to the Committee's President, Vinogradov, and Vice-President, Pontryagin" (p. 218) — and he notes that with this protocol, "in addition to arguments used repeatedly since the early 1970s, anti-Semitism was now explicitly recorded."

It bears directly on question-verify-novikov-pontryagin-margulis-fields-medal-block (item 3), which asked whether Novikov's framing of an antisemitic campaign — naming Vinogradov as orchestrator — could be corroborated outside his memoir. Lehto's account, read directly, is that corroboration for the general framing (an antisemitic-conspiracy narrative circulating at the institutional level and attributed in a signed record to Vinogradov and Pontryagin together), though it documents a different specific episode (a 1979 protocol about consultative-committee influence) than the 1978 Fields Medal travel block itself, and Lehto's book is a reproduction of the protocol's language rather than the signed document itself.