Pith Number

pith:EBXCYWF2

pith:2012:EBXCYWF2H3T2WV5PWWJVRJQHFC

not attested not anchored not stored refs pending

A geometric interpretation of the homotopy groups of the cobordism category

Anne Marie Svane, Marcel B\"okstedt

arxiv:1208.3370 v1 · 2012-08-16 · 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{EBXCYWF2H3T2WV5PWWJVRJQHFC}

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	2026-05-18T01:20:12.648575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

206e2c58ba3ee7ab57afb59358a60728a0df9f273dabdc58dcee8dd295f740b1

Aliases

arxiv: 1208.3370 · arxiv_version: 1208.3370v1 · doi: 10.48550/arxiv.1208.3370 · pith_short_12: EBXCYWF2H3T2 · pith_short_16: EBXCYWF2H3T2WV5P · pith_short_8: EBXCYWF2

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/EBXCYWF2H3T2WV5PWWJVRJQHFC \
  | 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: 206e2c58ba3ee7ab57afb59358a60728a0df9f273dabdc58dcee8dd295f740b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b093f6c25d9f610810caba4b548c564a00e6c3b983fdf040110a8232a2d5137",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-08-16T13:54:02Z",
    "title_canon_sha256": "012c7d7c10c9397720266738cf65a85d59fd6870f085e2463801438a3c536390"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.3370",
    "kind": "arxiv",
    "version": 1
  }
}