Pith Number

pith:RVQ7JAHR

pith:2019:RVQ7JAHRT4Y33G4QXO7MB4TU42

not attested not anchored not stored refs pending

Homotopy Theory in Digital Topology

Gregory Lupton, John Oprea, Nicholas Scoville

arxiv:1905.07783 v1 · 2019-05-19 · math.AT · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RVQ7JAHRT4Y33G4QXO7MB4TU42}

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	2026-05-17T23:45:48.492066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d61f480f19f31bd9b90bbbec0f274e68ac62fbf7155570d0c49b8e014c0407e

Aliases

arxiv: 1905.07783 · arxiv_version: 1905.07783v1 · doi: 10.48550/arxiv.1905.07783 · pith_short_12: RVQ7JAHRT4Y3 · pith_short_16: RVQ7JAHRT4Y33G4Q · pith_short_8: RVQ7JAHR

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/RVQ7JAHRT4Y33G4QXO7MB4TU42 \
  | 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: 8d61f480f19f31bd9b90bbbec0f274e68ac62fbf7155570d0c49b8e014c0407e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ae87078f04e42b8975844e1f95b156109740bfe90abe671ded5e2cce920bbd7",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-05-19T17:45:31Z",
    "title_canon_sha256": "a8e491bd5ed0ce062feea3ac5f7e00b3b15d27a150e05820e8f2b8a520838c5c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.07783",
    "kind": "arxiv",
    "version": 1
  }
}