Pith Number

pith:MTA3IXVO

pith:2016:MTA3IXVOAUVO45VBISCMSTCF44

not attested not anchored not stored refs pending

$G_\delta$ covers of compact spaces

Paul Szeptycki, Santi Spadaro

arxiv:1605.05630 v2 · 2016-05-18 · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MTA3IXVOAUVO45VBISCMSTCF44}

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	2026-05-18T00:40:13.921291Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64c1b45eae052aee76a14484c94c45e70d47573c6a60135fb0580fc7b3679590

Aliases

arxiv: 1605.05630 · arxiv_version: 1605.05630v2 · doi: 10.48550/arxiv.1605.05630 · pith_short_12: MTA3IXVOAUVO · pith_short_16: MTA3IXVOAUVO45VB · pith_short_8: MTA3IXVO

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/MTA3IXVOAUVO45VBISCMSTCF44 \
  | 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: 64c1b45eae052aee76a14484c94c45e70d47573c6a60135fb0580fc7b3679590

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a0339aea9d2ed144cf391bcdf6b5c1a5702afcb9bca61d4b8da61dba8df1435",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2016-05-18T15:51:36Z",
    "title_canon_sha256": "3de48538f1cc16c919c59ac734016085c18b78fdd5bfa11b81c8f8a5f14e4d90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.05630",
    "kind": "arxiv",
    "version": 2
  }
}