Pith Number

pith:ELMIY4YC

pith:2019:ELMIY4YCOGYBYPXWBQVLAOQUZV

not attested not anchored not stored refs pending

Data and homotopy types

J.F. Jardine

arxiv:1908.06323 v1 · 2019-08-17 · 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{ELMIY4YCOGYBYPXWBQVLAOQUZV}

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	2026-07-04T23:58:14.559811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22d88c730271b01c3ef60c2ab03a14cd64c3936baccbb3b1b45a9ba35ef3ca92

Aliases

arxiv: 1908.06323 · arxiv_version: 1908.06323v1 · doi: 10.48550/arxiv.1908.06323 · pith_short_12: ELMIY4YCOGYB · pith_short_16: ELMIY4YCOGYBYPXW · pith_short_8: ELMIY4YC

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/ELMIY4YCOGYBYPXWBQVLAOQUZV \
  | 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: 22d88c730271b01c3ef60c2ab03a14cd64c3936baccbb3b1b45a9ba35ef3ca92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "002710a6fd6a6626817d768bc144db540d40ba348844c688e23e3c2cceaa40e1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-08-17T17:39:12Z",
    "title_canon_sha256": "c540b1880eb94014764e43ccc826d1d6c2a948a145c5d49bd95296732d96a1a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06323",
    "kind": "arxiv",
    "version": 1
  }
}