Pith Number

pith:OB553QOC

pith:2009:OB553QOC6PGWWRGJMLRX2X7QPQ

not attested not anchored not stored refs pending

A new cohomological formula for helicity in $\R^{2k+1}$ reveals the effect of a diffeomorphism on helicity

Jason Cantarella, Jason Parsley

arxiv:0903.1465 v3 · 2009-03-08 · math.GT · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OB553QOC6PGWWRGJMLRX2X7QPQ}

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	2026-05-18T02:24:56.310055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

707bddc1c2f3cd6b44c962e37d5ff07c3abaa2456058eb87cbc94bda1d61cb23

Aliases

arxiv: 0903.1465 · arxiv_version: 0903.1465v3 · doi: 10.48550/arxiv.0903.1465 · pith_short_12: OB553QOC6PGW · pith_short_16: OB553QOC6PGWWRGJ · pith_short_8: OB553QOC

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/OB553QOC6PGWWRGJMLRX2X7QPQ \
  | 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: 707bddc1c2f3cd6b44c962e37d5ff07c3abaa2456058eb87cbc94bda1d61cb23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f4811d545b8850db31f08ef113abbb2686fc0a844f339996f4fd639cfd1ae69",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2009-03-08T23:30:41Z",
    "title_canon_sha256": "9b63aba48b4fa529bd46dd638f155750024f48e9b1a286b84fda108c34f68023"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.1465",
    "kind": "arxiv",
    "version": 3
  }
}