Pith Number

pith:UQPXM7SO

pith:2011:UQPXM7SOGR3PIEHUKKEKQTPXJJ

not attested not anchored not stored refs pending

The symmetric signature of a Witt space

Greg Friedman, James McClure

arxiv:1106.4798 v2 · 2011-06-23 · math.AT · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UQPXM7SOGR3PIEHUKKEKQTPXJJ}

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	2026-05-18T03:07:32.217581Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a41f767e4e3476f410f45288a84df74a4cb90201f4cc286e8cb6145f66823abe

Aliases

arxiv: 1106.4798 · arxiv_version: 1106.4798v2 · doi: 10.48550/arxiv.1106.4798 · pith_short_12: UQPXM7SOGR3P · pith_short_16: UQPXM7SOGR3PIEHU · pith_short_8: UQPXM7SO

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/UQPXM7SOGR3PIEHUKKEKQTPXJJ \
  | 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: a41f767e4e3476f410f45288a84df74a4cb90201f4cc286e8cb6145f66823abe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50c60a2a032cf7175ea643390056157d423c7464c2e72b5a26732a22e1c96518",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2011-06-23T19:24:56Z",
    "title_canon_sha256": "f438bc93af9c482e230cc5b2732f54d3724fd221d7cc601a15b1141d2df98f92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.4798",
    "kind": "arxiv",
    "version": 2
  }
}