Pith Number

pith:6MO2JC2X

pith:2019:6MO2JC2XYFV6AMB7BF5WORCODH

not attested not anchored not stored refs pending

A family of hemisystems on the parabolic quadrics

Alice C. Niemeyer, Jesse Lansdown

arxiv:1908.08886 v1 · 2019-08-23 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6MO2JC2XYFV6AMB7BF5WORCODH}

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	2026-07-04T23:59:24.933982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f31da48b57c16be0303f097b67444e19f5406cb7e3ced9118c5f9e36f9e01e5f

Aliases

arxiv: 1908.08886 · arxiv_version: 1908.08886v1 · doi: 10.48550/arxiv.1908.08886 · pith_short_12: 6MO2JC2XYFV6 · pith_short_16: 6MO2JC2XYFV6AMB7 · pith_short_8: 6MO2JC2X

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/6MO2JC2XYFV6AMB7BF5WORCODH \
  | 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: f31da48b57c16be0303f097b67444e19f5406cb7e3ced9118c5f9e36f9e01e5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2956f5c20d65cefb361d743e77eae98cd289a5bfae06b7c8f976b2dfa243829",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-08-23T16:09:41Z",
    "title_canon_sha256": "939860d8b04cc1f299575dfc6e6dc24771b9eafb18ac75274285961ff9eb2397"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08886",
    "kind": "arxiv",
    "version": 1
  }
}