V.G. Boltyanskii

Soviet mathematician (1925–2011), Pontryagin's former student and one of the three co-discoverers, alongside Pontryagin and Gamkrelidze, of the 1956 maximum principle of optimal control theory.

Matters to this vault on two separate grounds: he invented the "needle variations" technique that made the general-case proof of the maximum principle possible — the fourth and hardest technical step in the 1956 discovery, credited to him alone by Gamkrelidze's own first-person account (claim-gamkrelidze-2003-account-divides-1956-discovery-among-pontryagin-gamkrelidze-boltyanskii) — and his own reported 1994 testimony is the vault's sole source for the finding that the "Pontryagin maximum principle" naming convention was fixed under pressure from Pontryagin himself, inside the Steklov Institute, before any Western reception of the work (claim-boltyanskii-testimony-locates-pontryagin-naming-convention-in-internal-soviet-pressure). That testimony reaches this vault only secondhand, via Pesch & Plail's 2009 summary — see question-verify-boltyanskii-1994-primary-naming-pressure-testimony.

References

• claim-gamkrelidze-2003-account-divides-1956-discovery-among-pontryagin-gamkrelidze-boltyanskii
• claim-boltyanskii-testimony-locates-pontryagin-naming-convention-in-internal-soviet-pressure
• claim-1962-western-translation-credited-all-four-soviet-authors-despite-pontryagin-naming-convention
• claim-pontryagin-credit-asymmetry-mechanism-differs-from-backprop-attribution-gap
• claim-pesch-plail-2012-retelling-of-boltyanskii-testimony-is-self-consistent-not-independent
• claim-pesch-plail-direct-contact-with-boltyanskii-and-gamkrelidze-beyond-1994-report
• question-verify-boltyanskii-1994-primary-naming-pressure-testimony

Updates

• 2026-11-06: his own 1994 primary report (Report No. 526, DFG Schwerpunktprogramm, TU München) remains unlocated after a dedicated search — a Report No. 526-shaped document appears to exist only in German university library holdings, not online. A second, independently-timed retelling of his naming-pressure testimony (Pesch & Plail 2012) restates the 2009 account closely and adds a new detail — Rozonoér's 1959 tripartite paper — rather than retreating from it (claim-pesch-plail-2012-retelling-of-boltyanskii-testimony-is-self-consistent-not-independent). Separately, the same 2012 paper establishes Pesch & Plail had direct contact ("statements to the authors") with Boltyanskii beyond the written report, though on a different point (claim-pesch-plail-direct-contact-with-boltyanskii-and-gamkrelidze-beyond-1994-report). Also noted: Wikipedia gives his dates as 1925–2019, conflicting with the 1925–2011 given above — unresolved, see 00-meta/seek-flags.md 2026-11-06.