Pith Number

pith:ZDD62UJD

pith:2013:ZDD62UJDIREYDFF37XJZRMVGJL

not attested not anchored not stored refs pending

Frames in Krein spaces arising from a non-regular W-metric

Elmar Wagner, Kevin Esmeral, Osmin Ferrer

arxiv:1304.2450 v1 · 2013-04-09 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZDD62UJDIREYDFF37XJZRMVGJL}

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	2026-05-18T03:28:31.991819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8c7ed512344498194bbfdd398b2a64ad8284cd2347de9046bdee12ce9c72a9f

Aliases

arxiv: 1304.2450 · arxiv_version: 1304.2450v1 · doi: 10.48550/arxiv.1304.2450 · pith_short_12: ZDD62UJDIREY · pith_short_16: ZDD62UJDIREYDFF3 · pith_short_8: ZDD62UJD

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/ZDD62UJDIREYDFF37XJZRMVGJL \
  | 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: c8c7ed512344498194bbfdd398b2a64ad8284cd2347de9046bdee12ce9c72a9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f596294bbc12f674acee3ec8311b98870a4aacb4e9a552901642e72d038989be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2013-04-09T02:41:25Z",
    "title_canon_sha256": "1ef36f4d6a22068d65963da9f42c2f63b80837525aeb15f054097f051d686ae6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2450",
    "kind": "arxiv",
    "version": 1
  }
}