Pith Number

pith:CQ5EODIW

pith:2019:CQ5EODIWF3EMEH4F43HVGFUQ4H

not attested not anchored not stored refs pending

Computing the intersection of two quadrics through projection and lifting

Alexandre Trocado, Laureano Gonzalez-Vega

arxiv:1903.06983 v2 · 2019-03-16 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CQ5EODIWF3EMEH4F43HVGFUQ4H}

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	2026-05-17T23:42:20.678407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

143a470d162ec8c21f85e6cf531690e1cf9f6bc66d0658b693a36aeb6ddcf260

Aliases

arxiv: 1903.06983 · arxiv_version: 1903.06983v2 · doi: 10.48550/arxiv.1903.06983 · pith_short_12: CQ5EODIWF3EM · pith_short_16: CQ5EODIWF3EMEH4F · pith_short_8: CQ5EODIW

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/CQ5EODIWF3EMEH4F43HVGFUQ4H \
  | 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: 143a470d162ec8c21f85e6cf531690e1cf9f6bc66d0658b693a36aeb6ddcf260

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6bbfcd40057ffcbb2921b1e5e27aa716a47f0ab038c0b451c1bb5f87bd49e17c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-03-16T20:43:20Z",
    "title_canon_sha256": "c6b21c65b7e038d8dacdcd9e67ffdb9c4b14644d4b8fc8b4747ad0d56cb6b18b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06983",
    "kind": "arxiv",
    "version": 2
  }
}