Pith Number

pith:BDXISAKW

pith:2019:BDXISAKWVZMZIF65D66WKOMBXQ

not attested not anchored not stored refs pending

The flux homomorphism and central extensions of diffeomorphism groups

Shuhei Maruyama

arxiv:1905.08029 v2 · 2019-05-20 · math.GT · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BDXISAKWVZMZIF65D66WKOMBXQ}

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	2026-05-17T23:40:10.774624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08ee890156ae599417dd1fbd653981bc04d57bac4a88d3087b440bb4c8e7e121

Aliases

arxiv: 1905.08029 · arxiv_version: 1905.08029v2 · doi: 10.48550/arxiv.1905.08029 · pith_short_12: BDXISAKWVZMZ · pith_short_16: BDXISAKWVZMZIF65 · pith_short_8: BDXISAKW

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/BDXISAKWVZMZIF65D66WKOMBXQ \
  | 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: 08ee890156ae599417dd1fbd653981bc04d57bac4a88d3087b440bb4c8e7e121

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17a7c706c3ebd155d8b6f15923e19e530c04055b8784ea57ceb4fdc6f400edf3",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2019-05-20T12:24:31Z",
    "title_canon_sha256": "502633b1078e60c5987e5cde41833b249425cf8ac7fb062b500d22a9711071f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.08029",
    "kind": "arxiv",
    "version": 2
  }
}