Pith Number

pith:4B6XDR4L

pith:2010:4B6XDR4LLVJU5UWZLT2B7L6YRL

not attested not anchored not stored refs pending

The integral cohomology groups of configuration spaces of pairs of points in real projective spaces

Jesus Gonzalez, Peter Landweber

arxiv:1004.0746 v3 · 2010-04-06 · 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{4B6XDR4LLVJU5UWZLT2B7L6YRL}

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	2026-05-18T04:04:07.013748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e07d71c78b5d534ed2d95cf41fafd88ad7ee96f9f6c27420f2f291b8a67c370b

Aliases

arxiv: 1004.0746 · arxiv_version: 1004.0746v3 · doi: 10.48550/arxiv.1004.0746 · pith_short_12: 4B6XDR4LLVJU · pith_short_16: 4B6XDR4LLVJU5UWZ · pith_short_8: 4B6XDR4L

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/4B6XDR4LLVJU5UWZLT2B7L6YRL \
  | 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: e07d71c78b5d534ed2d95cf41fafd88ad7ee96f9f6c27420f2f291b8a67c370b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1dcfe202b3925d8519f81f11cb75f37162e80709b55d9edaffc4dcfb7073110c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2010-04-06T01:16:03Z",
    "title_canon_sha256": "89a57945eafe197a85178ffffe833775cdc31ffac67ee5fadb41497721b849f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.0746",
    "kind": "arxiv",
    "version": 3
  }
}