Pith Number

pith:5EMEQJJJ

pith:2012:5EMEQJJJ23X262TYZWFX3F7DCS

not attested not anchored not stored refs pending

On the Equivalence Problem for Toric Contact Structures on S^3-bundles over S^2$

Charles P. Boyer, Justin Pati

arxiv:1204.2209 v1 · 2012-04-10 · math.SG · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5EMEQJJJ23X262TYZWFX3F7DCS}

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	2026-05-18T01:22:26.713733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e918482529d6efaf6a78cd8b7d97e314af44a6661d60e19f1cdbf0af0b8c69c5

Aliases

arxiv: 1204.2209 · arxiv_version: 1204.2209v1 · doi: 10.48550/arxiv.1204.2209 · pith_short_12: 5EMEQJJJ23X2 · pith_short_16: 5EMEQJJJ23X262TY · pith_short_8: 5EMEQJJJ

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/5EMEQJJJ23X262TYZWFX3F7DCS \
  | 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: e918482529d6efaf6a78cd8b7d97e314af44a6661d60e19f1cdbf0af0b8c69c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "607bf15f834aed77cc43b13785a172200625108e98d6ba97c7aeb035d421a673",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2012-04-10T16:19:48Z",
    "title_canon_sha256": "7b848ec6160b7e28c1697398287c28259b87814a558c195ff01b2c3f3fd6628f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2209",
    "kind": "arxiv",
    "version": 1
  }
}