Pith Number

pith:DQWBG2JL

pith:2014:DQWBG2JLUDHXRUXT5VN6VP4AUS

not attested not anchored not stored refs pending

On the pseudolinear crossing number

Cesar Hernandez-Velez, Gelasio Salazar, Jesus Leanos

arxiv:1404.7332 v1 · 2014-04-29 · 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{DQWBG2JLUDHXRUXT5VN6VP4AUS}

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	2026-05-17T23:47:44.685230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c2c13692ba0cf78d2f3ed5beabf80a49484ce893054affaafd5603c98bc9793

Aliases

arxiv: 1404.7332 · arxiv_version: 1404.7332v1 · doi: 10.48550/arxiv.1404.7332 · pith_short_12: DQWBG2JLUDHX · pith_short_16: DQWBG2JLUDHXRUXT · pith_short_8: DQWBG2JL

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/DQWBG2JLUDHXRUXT5VN6VP4AUS \
  | 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: 1c2c13692ba0cf78d2f3ed5beabf80a49484ce893054affaafd5603c98bc9793

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9addf82bce9b36ba0c17b7d531ccf05b01339e93e341d535e6b65fad109ded41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-04-29T12:21:58Z",
    "title_canon_sha256": "16d261ea137b66e2a41715335657b18461eef2648826d958548259c653aedf01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.7332",
    "kind": "arxiv",
    "version": 1
  }
}