Pith Number

pith:QJ2NO22N

pith:2012:QJ2NO22NP4KBZ3D55UUJ22KTTA

not attested not anchored not stored refs pending

Cohomology of 3-points configuration spaces of complex projective spaces

Barbu Berceanu, Samia Ashraf

arxiv:1212.1291 v1 · 2012-12-06 · math.GT · 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{QJ2NO22NP4KBZ3D55UUJ22KTTA}

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	2026-05-18T03:39:04.337848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8274d76b4d7f141cec7ded289d695398358792193e9fad957d9fc133c04a0524

Aliases

arxiv: 1212.1291 · arxiv_version: 1212.1291v1 · doi: 10.48550/arxiv.1212.1291 · pith_short_12: QJ2NO22NP4KB · pith_short_16: QJ2NO22NP4KBZ3D5 · pith_short_8: QJ2NO22N

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/QJ2NO22NP4KBZ3D55UUJ22KTTA \
  | 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: 8274d76b4d7f141cec7ded289d695398358792193e9fad957d9fc133c04a0524

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b898baf7783d0936a16ccd17e8184213c2927693258d845b4da663032e4ca516",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2012-12-06T11:16:02Z",
    "title_canon_sha256": "2809d815401c8c8465422aa1989bf35f516bdc45ae9dd2752e3406beb70f1935"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1291",
    "kind": "arxiv",
    "version": 1
  }
}