Pith Number

pith:EW5RUNFV

pith:2015:EW5RUNFV23JPDNUAYRVMX6CCGV

not attested not anchored not stored refs pending

Semiprojectivity and properly infinite projections in graph C*-algebras

S{\o}ren Eilers, Takeshi Katsura

arxiv:1512.07277 v1 · 2015-12-22 · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EW5RUNFV23JPDNUAYRVMX6CCGV}

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	2026-05-18T01:23:50.177065Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25bb1a34b5d6d2f1b680c46acbf8423564dbce051e34945de0b9340b0e67c720

Aliases

arxiv: 1512.07277 · arxiv_version: 1512.07277v1 · doi: 10.48550/arxiv.1512.07277 · pith_short_12: EW5RUNFV23JP · pith_short_16: EW5RUNFV23JPDNUA · pith_short_8: EW5RUNFV

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/EW5RUNFV23JPDNUAYRVMX6CCGV \
  | 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: 25bb1a34b5d6d2f1b680c46acbf8423564dbce051e34945de0b9340b0e67c720

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7535b649f4f22c5d1b9d25c22fd672e23f4a55a5fb76caf6dd3b5b51daafaff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2015-12-22T22:02:01Z",
    "title_canon_sha256": "ff13aace8aa79f5ac5d562fb3b589dd92c48e9f7974c30f6a54b276e941c7d78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07277",
    "kind": "arxiv",
    "version": 1
  }
}