Pith Number

pith:QWFVXYI7

pith:2013:QWFVXYI7HC3IMR22V4WEZFO53C

not attested not anchored not stored refs pending

Positive isotropic curvature and self-duality in dimension 4

Harish Seshadri, Thomas Richard

arxiv:1311.5256 v2 · 2013-11-20 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QWFVXYI7HC3IMR22V4WEZFO53C}

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	2026-05-18T03:00:49.061032Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858b5be11f38b686475aaf2c4c95ddd8b60b8b979eee8406c53bf3fa90e3079c

Aliases

arxiv: 1311.5256 · arxiv_version: 1311.5256v2 · doi: 10.48550/arxiv.1311.5256 · pith_short_12: QWFVXYI7HC3I · pith_short_16: QWFVXYI7HC3IMR22 · pith_short_8: QWFVXYI7

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/QWFVXYI7HC3IMR22V4WEZFO53C \
  | 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: 858b5be11f38b686475aaf2c4c95ddd8b60b8b979eee8406c53bf3fa90e3079c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99ce57aa623a8ae0079eef7c229b52d8b6b53d57b2e3fbb39065ba02561d32fc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-11-20T22:55:16Z",
    "title_canon_sha256": "84ae4f31724fc9aa71f05f4868d8d195e1eee91f9658a83be7c96ac2fb15764d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5256",
    "kind": "arxiv",
    "version": 2
  }
}