Pith Number

pith:XIUPODIW

pith:2017:XIUPODIWK477IOYGBE66N25QRV

not attested not anchored not stored refs pending

Intersection forms of almost-flat 4-manifolds

Andrzej Szczepanski

arxiv:1709.04633 v1 · 2017-09-14 · math.AT · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XIUPODIWK477IOYGBE66N25QRV}

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	2026-05-18T00:18:36.080877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba28f70d16573ff43b06093de6ebb08d4f0bf6e8911517fed8ee0a25cbf33b8e

Aliases

arxiv: 1709.04633 · arxiv_version: 1709.04633v1 · doi: 10.48550/arxiv.1709.04633 · pith_short_12: XIUPODIWK477 · pith_short_16: XIUPODIWK477IOYG · pith_short_8: XIUPODIW

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/XIUPODIWK477IOYGBE66N25QRV \
  | 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: ba28f70d16573ff43b06093de6ebb08d4f0bf6e8911517fed8ee0a25cbf33b8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00bfad42876e978d182c086c9443a77b4e811d2cfe54b4cec20fff653ff679d2",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-09-14T06:44:31Z",
    "title_canon_sha256": "7f2f3627423ca88f3e3564676f6fd8740bc94ed4f1433d8392a412701a9b0bbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.04633",
    "kind": "arxiv",
    "version": 1
  }
}