Pith Number

pith:UHI57S2J

pith:2019:UHI57S2JGK3QEYGE3PKQFO2JGO

not attested not anchored not stored refs pending

A lift from group cohomology to spectra for trivial profinite actions

Daniel G. Davis

arxiv:1908.01898 v1 · 2019-08-05 · 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{UHI57S2JGK3QEYGE3PKQFO2JGO}

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	2026-07-04T23:51:48.818155Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1d1dfcb4932b70260c4dbd502bb49338932314acdf0149666e456933b16813c

Aliases

arxiv: 1908.01898 · arxiv_version: 1908.01898v1 · doi: 10.48550/arxiv.1908.01898 · pith_short_12: UHI57S2JGK3Q · pith_short_16: UHI57S2JGK3QEYGE · pith_short_8: UHI57S2J

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/UHI57S2JGK3QEYGE3PKQFO2JGO \
  | 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: a1d1dfcb4932b70260c4dbd502bb49338932314acdf0149666e456933b16813c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f089910a905dff7cad880d6fe79bead6f29f0d978502d6cf5b3e14f4a08b524d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-08-05T23:09:20Z",
    "title_canon_sha256": "19bc17d106341f641c0014dbe1666d33a675d58412bdda4283c7cb096c81c510"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01898",
    "kind": "arxiv",
    "version": 1
  }
}