Pith Number

pith:RGZMSF5R

pith:2012:RGZMSF5RPZFXSD5LBLEFPDITMO

not attested not anchored not stored refs pending

Sketches of a platypus: persistent homology and its algebraic foundations

Mikael Vejdemo-Johansson

arxiv:1212.5398 v2 · 2012-12-21 · math.AT · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RGZMSF5RPZFXSD5LBLEFPDITMO}

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	2026-05-18T03:07:34.541879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89b2c917b17e4b790fab0ac8578d136383fb64d955ca80e0ea81d9136732bd4c

Aliases

arxiv: 1212.5398 · arxiv_version: 1212.5398v2 · doi: 10.48550/arxiv.1212.5398 · pith_short_12: RGZMSF5RPZFX · pith_short_16: RGZMSF5RPZFXSD5L · pith_short_8: RGZMSF5R

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/RGZMSF5RPZFXSD5LBLEFPDITMO \
  | 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: 89b2c917b17e4b790fab0ac8578d136383fb64d955ca80e0ea81d9136732bd4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aceaf6562c27bde82a50f3da6f8cb9e054e62bbc78357674a601271479aad71f",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-12-21T11:15:39Z",
    "title_canon_sha256": "93a48b3a44557a3bd77a6f0b4eef9323cf17a21b1c20340c08978e6bbbcbce8d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5398",
    "kind": "arxiv",
    "version": 2
  }
}