Pith Number

pith:YE4BGCFI

pith:2008:YE4BGCFICH4HHBGNOZABS2RPOO

not attested not anchored not stored refs pending

Bivariant K-theory via correspondences

Heath Emerson, Ralf Meyer

arxiv:0812.4949 v2 · 2008-12-30 · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YE4BGCFICH4HHBGNOZABS2RPOO}

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	2026-05-18T03:52:26.780995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1381308a811f87384cd7640196a2f7385bf725870a6c028c87f29cd5eb223ec

Aliases

arxiv: 0812.4949 · arxiv_version: 0812.4949v2 · doi: 10.48550/arxiv.0812.4949 · pith_short_12: YE4BGCFICH4H · pith_short_16: YE4BGCFICH4HHBGN · pith_short_8: YE4BGCFI

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/YE4BGCFICH4HHBGNOZABS2RPOO \
  | 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: c1381308a811f87384cd7640196a2f7385bf725870a6c028c87f29cd5eb223ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "404a2ca2de868bc0643aeb339d20d87266f00f98d430ae2dbc6bf8cdf16a7c0e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2008-12-30T19:07:05Z",
    "title_canon_sha256": "a27a3bef64569ae12d1d07117012c39236edab00f8ba8443f1f85ee4a1aa1fc4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4949",
    "kind": "arxiv",
    "version": 2
  }
}