Pith Number

pith:OHVRSSA2

pith:2018:OHVRSSA22MYRECAXKEGXHTYBHC

not attested not anchored not stored refs pending

Uniform K-theory, and Poincare duality for uniform K-homology

Alexander Engel

arxiv:1808.07911 v1 · 2018-08-23 · math.KT · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OHVRSSA22MYRECAXKEGXHTYBHC}

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	2026-05-18T00:07:23.025358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71eb19481ad331120817510d73cf01389f708d719ba177424076e93de8dd8447

Aliases

arxiv: 1808.07911 · arxiv_version: 1808.07911v1 · doi: 10.48550/arxiv.1808.07911 · pith_short_12: OHVRSSA22MYR · pith_short_16: OHVRSSA22MYRECAX · pith_short_8: OHVRSSA2

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/OHVRSSA22MYRECAXKEGXHTYBHC \
  | 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: 71eb19481ad331120817510d73cf01389f708d719ba177424076e93de8dd8447

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88c79a6351bb0192e3bf37637cd37042723fdb2553cc6244204acd7008f7ea0b",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2018-08-23T19:17:53Z",
    "title_canon_sha256": "4e15059e77979ac082cd25a7af731dd640c184e0d23e1189c173220f1ac698bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.07911",
    "kind": "arxiv",
    "version": 1
  }
}