Pith Number

pith:L64EEDDA

pith:2015:L64EEDDAQZZYAKVVTNKXKJHUA6

not attested not anchored not stored refs pending

Presentation complexes with the fixed point property

Iv\'an Sadofschi Costa

arxiv:1502.02350 v2 · 2015-02-09 · 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{L64EEDDAQZZYAKVVTNKXKJHUA6}

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	2026-05-18T00:47:51.417128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fb8420c608673802ab59b557524f4079e6b60005644f8db6636bdc7803d7005

Aliases

arxiv: 1502.02350 · arxiv_version: 1502.02350v2 · doi: 10.48550/arxiv.1502.02350 · pith_short_12: L64EEDDAQZZY · pith_short_16: L64EEDDAQZZYAKVV · pith_short_8: L64EEDDA

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/L64EEDDAQZZYAKVVTNKXKJHUA6 \
  | 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: 5fb8420c608673802ab59b557524f4079e6b60005644f8db6636bdc7803d7005

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "031be2baf9a0939ac1268ced044cfe5e23aa13f5ea92cf5a24991afc53853a3d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-02-09T04:17:48Z",
    "title_canon_sha256": "fc5905ad5509801034f72262dfd8ea164a86d40796302ea52ead5d0764224497"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02350",
    "kind": "arxiv",
    "version": 2
  }
}