Pith Number

pith:P7Y3CGMO

pith:2019:P7Y3CGMOHYWSBKVXQBGJITG6F7

not attested not anchored not stored refs pending

Classifying spaces for projections of immersions with controlled singularities

Andr\'as Sz\H{u}cs, Tam\'as Terpai

arxiv:1902.06786 v2 · 2019-02-18 · 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{P7Y3CGMOHYWSBKVXQBGJITG6F7}

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	2026-05-17T23:52:35.853231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ff1b1198e3e2d20aab7804c944cde2fd2b84a4ebecd583fda729272da548d35

Aliases

arxiv: 1902.06786 · arxiv_version: 1902.06786v2 · doi: 10.48550/arxiv.1902.06786 · pith_short_12: P7Y3CGMOHYWS · pith_short_16: P7Y3CGMOHYWSBKVX · pith_short_8: P7Y3CGMO

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/P7Y3CGMOHYWSBKVXQBGJITG6F7 \
  | 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: 7ff1b1198e3e2d20aab7804c944cde2fd2b84a4ebecd583fda729272da548d35

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1fb546d9c8ff94e5a1265b16559f7654f45c2ec9e876178087eee0349bf1aa4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2019-02-18T20:22:10Z",
    "title_canon_sha256": "43c97e642d07baaa9d2b8e8682f67881fc31226da8ba0e75e8edd2ff787470f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06786",
    "kind": "arxiv",
    "version": 2
  }
}