Pith Number

pith:Y3QUVRFJ

pith:2014:Y3QUVRFJCRXNRDQKDYZDP575AT

not attested not anchored not stored refs pending

On the diagonal subalgebra of an Ext algebra

Dan Zacharia, Edward L. Green, Nicole Snashall, {\O}yvind Solberg

arxiv:1412.4953 v1 · 2014-12-16 · math.KT · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y3QUVRFJCRXNRDQKDYZDP575AT}

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	2026-05-18T02:31:10.012496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6e14ac4a9146ed88e0a1e3237f7fd04eaf3d4e05543c7e3e962a4b92f148990

Aliases

arxiv: 1412.4953 · arxiv_version: 1412.4953v1 · doi: 10.48550/arxiv.1412.4953 · pith_short_12: Y3QUVRFJCRXN · pith_short_16: Y3QUVRFJCRXNRDQK · pith_short_8: Y3QUVRFJ

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/Y3QUVRFJCRXNRDQKDYZDP575AT \
  | 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: c6e14ac4a9146ed88e0a1e3237f7fd04eaf3d4e05543c7e3e962a4b92f148990

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b05cea716b495b84b5bdc21ef5f5c40e406c2ff35de00fa69bed9709fdf08419",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2014-12-16T11:20:01Z",
    "title_canon_sha256": "124b7567cd753df9389b98c68550ec24fe2750cc8319c3d94d15eb36724b934f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.4953",
    "kind": "arxiv",
    "version": 1
  }
}