Pith Number

pith:NGJQJTWU

pith:1992:NGJQJTWU6BDFLUOKCUUHFXZHB7

not attested not anchored not stored refs pending

Interpolation of compact operators by the methods of Calder\'on and Gustavsson-Peetre

Michael Cwikel, Nigel J. Kalton

arxiv:math/9210206 v1 · 1992-10-08 · math.FA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGJQJTWU6BDFLUOKCUUHFXZHB7}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:05:52.585559Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

699304ced4f04655d1ca152872df270fe22057fa2c5b6dfd7c7e4918048ced4e

Aliases

arxiv: math/9210206 · arxiv_version: math/9210206v1 · doi: 10.48550/arxiv.math/9210206 · pith_short_12: NGJQJTWU6BDF · pith_short_16: NGJQJTWU6BDFLUOK · pith_short_8: NGJQJTWU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NGJQJTWU6BDFLUOKCUUHFXZHB7 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 699304ced4f04655d1ca152872df270fe22057fa2c5b6dfd7c7e4918048ced4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7df809aff7f1c15b0182db5f2775df055ba3f16aa824a281b0a2f891452c7499",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.FA",
    "submitted_at": "1992-10-08T15:45:24Z",
    "title_canon_sha256": "c603f83dd3cdaa8cc1b6da9ce7eafaa5196492a6ce907e026fb61f7ac0eecb74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9210206",
    "kind": "arxiv",
    "version": 1
  }
}