Pith Number

pith:6EHFOTP4

pith:2018:6EHFOTP4DUXFZD5BE76L6SPQRA

not attested not anchored not stored refs pending

Semi-Fredholm and Semi-Browder Spectra For $C_0$-Quasi-Semigroups

Abdelaziz Tajmouati, Youness Zahouan

arxiv:1812.07278 v1 · 2018-12-18 · math.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6EHFOTP4DUXFZD5BE76L6SPQRA}

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	2026-05-17T23:58:00.971626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f10e574dfc1d2e5c8fa127fcbf49f08833047500a60c51df25d3cd3e6e8efd2b

Aliases

arxiv: 1812.07278 · arxiv_version: 1812.07278v1 · doi: 10.48550/arxiv.1812.07278 · pith_short_12: 6EHFOTP4DUXF · pith_short_16: 6EHFOTP4DUXFZD5B · pith_short_8: 6EHFOTP4

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/6EHFOTP4DUXFZD5BE76L6SPQRA \
  | 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: f10e574dfc1d2e5c8fa127fcbf49f08833047500a60c51df25d3cd3e6e8efd2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f298c0f86434eb122477c00a24e4077eae9842681d940b9e077a7a264a592788",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SP",
    "submitted_at": "2018-12-18T10:35:28Z",
    "title_canon_sha256": "a3362a329449ef441d8849e16de3f8edc320c3a51a7c55222387858cca395676"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.07278",
    "kind": "arxiv",
    "version": 1
  }
}