Pith Number

pith:NFOU3JT6

pith:2012:NFOU3JT6NNIXQHEYJHICA2HR36

not attested not anchored not stored refs pending

How do curved spheres intersect in 3-space?

Sergey Avvakumov

arxiv:1210.7361 v2 · 2012-10-27 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NFOU3JT6NNIXQHEYJHICA2HR36}

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	2026-05-18T02:32:46.563183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

695d4da67e6b51781c9849d02068f1df9ceb22637634d8bebb392bcf7a5e1d6a

Aliases

arxiv: 1210.7361 · arxiv_version: 1210.7361v2 · doi: 10.48550/arxiv.1210.7361 · pith_short_12: NFOU3JT6NNIX · pith_short_16: NFOU3JT6NNIXQHEY · pith_short_8: NFOU3JT6

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/NFOU3JT6NNIXQHEYJHICA2HR36 \
  | 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: 695d4da67e6b51781c9849d02068f1df9ceb22637634d8bebb392bcf7a5e1d6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fbd2ffd12fb6bccb04d19673e2fd6d0d3e9f7fea448ba9927fbfabaaf421faf0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2012-10-27T19:10:48Z",
    "title_canon_sha256": "a17d6bbc310f749690e81ed8017e3dbe7b3d262567b5f0294acbbe0fe33e9e60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.7361",
    "kind": "arxiv",
    "version": 2
  }
}