Pith Number

pith:37IHVSQ3

pith:2017:37IHVSQ3S6I7T3M6NKAAZZOPLK

not attested not anchored not stored refs pending

Secants, bitangents, and their congruences

Bernt Ivar Utst{\o}l N{\o}dland, Kathl\'en Kohn, Paolo Tripoli

arxiv:1701.03711 v2 · 2017-01-13 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{37IHVSQ3S6I7T3M6NKAAZZOPLK}

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	2026-05-18T00:32:59.920189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfd07aca1b9791f9ed9e6a800ce5cf5a8d1f7b712b5795348f5da67835d5749f

Aliases

arxiv: 1701.03711 · arxiv_version: 1701.03711v2 · doi: 10.48550/arxiv.1701.03711 · pith_short_12: 37IHVSQ3S6I7 · pith_short_16: 37IHVSQ3S6I7T3M6 · pith_short_8: 37IHVSQ3

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/37IHVSQ3S6I7T3M6NKAAZZOPLK \
  | 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: dfd07aca1b9791f9ed9e6a800ce5cf5a8d1f7b712b5795348f5da67835d5749f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3651aaff14d3ae8bae4f7307f1f33e1c51ace186a889d85a179997958fec734b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-01-13T16:25:17Z",
    "title_canon_sha256": "e1a29794d5d6e33a6b606cb33855bb471173288561e406bc3e67e61d078bdcf2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.03711",
    "kind": "arxiv",
    "version": 2
  }
}