The complex Grothendieck constant (10b)

The complex Grothendieck constant

10b

Upper bound, last-listed row

| $1.40491$ | [H1987] | Best known general upper bound (Haagerup). |tracked since 2026-07-24 — no movement seen yet

Lower bound, last-listed row

| $1.338$ | [D1984] | Best known general lower bound (Davie; cited by Haagerup). |tracked since 2026-07-24 — no movement seen yet

Cite this row

Bounds Ledger — The complex Grothendieck constant (10b)
upper bound: $1.40491$ (tracked since 2026-07-24 — no movement seen yet)
lower bound: $1.338$ (tracked since 2026-07-24 — no movement seen yet)
Mirrored from teorth/optimizationproblems@2c1968c. These are the last-listed rows of that constant's bounds table — a listing position, not a statement that this bound is the strongest or most recent. A snapshot at that sha, not a live read.
https://u00dxk2.github.io/bounds-ledger/c/10b.html