Pith Number

pith:OVZZKNOU

pith:2015:OVZZKNOUOSX6L2N4CDWHHNWBGK

not attested not anchored not stored refs pending

Comparing the orthogonal and homotopy functor calculi

David Barnes, Rosona Eldred

arxiv:1505.05458 v1 · 2015-05-20 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OVZZKNOUOSX6L2N4CDWHHNWBGK}

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	2026-05-18T02:03:56.294336Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75739535d474afe5e9bc10ec73b6c1328b19c6e5ff06fcd45da57a09cf2f40f8

Aliases

arxiv: 1505.05458 · arxiv_version: 1505.05458v1 · doi: 10.48550/arxiv.1505.05458 · pith_short_12: OVZZKNOUOSX6 · pith_short_16: OVZZKNOUOSX6L2N4 · pith_short_8: OVZZKNOU

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/OVZZKNOUOSX6L2N4CDWHHNWBGK \
  | 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: 75739535d474afe5e9bc10ec73b6c1328b19c6e5ff06fcd45da57a09cf2f40f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f9ebbfada8d76467759f0bf26abd4e2b9ffef0758f2fe8f0465906827a9d37f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-05-20T17:31:34Z",
    "title_canon_sha256": "d5ef6b842183f1fbb90b920e96cb8516c0e98ca60f2a7894c3ded28e4d3bf22d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.05458",
    "kind": "arxiv",
    "version": 1
  }
}