Pith Number

pith:UB3GTCOQ

pith:2014:UB3GTCOQDELJYKZ4N2EUALCQVM

not attested not anchored not stored refs pending

On the K-theory of certain extensions of free groups

S. Prassidis, V. Metaftsis

arxiv:1410.3269 v1 · 2014-10-13 · 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{UB3GTCOQDELJYKZ4N2EUALCQVM}

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	2026-05-18T02:40:11.671052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0766989d019169c2b3c6e89402c50ab29fe095393170d372547ef86ce34e368

Aliases

arxiv: 1410.3269 · arxiv_version: 1410.3269v1 · doi: 10.48550/arxiv.1410.3269 · pith_short_12: UB3GTCOQDELJ · pith_short_16: UB3GTCOQDELJYKZ4 · pith_short_8: UB3GTCOQ

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/UB3GTCOQDELJYKZ4N2EUALCQVM \
  | 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: a0766989d019169c2b3c6e89402c50ab29fe095393170d372547ef86ce34e368

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "641fb7281f003021653cf4420e06ce975a0ffdf55e07dacb2c17e981fa68f886",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2014-10-13T11:51:22Z",
    "title_canon_sha256": "db228519f17aaf77a6c4b1f64a7fe7ad3b6ed1910da40e59218c0dc77e4a9ebb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.3269",
    "kind": "arxiv",
    "version": 1
  }
}