Pith Number

pith:7WWJUSB2

pith:2014:7WWJUSB2F746EIQGGXXAFXKUYN

not attested not anchored not stored refs pending

Optimal DVB-S2 spectral efficiency with hierarchical modulation

Hugo Meric

arxiv:1411.5098 v1 · 2014-11-19 · cs.IT · cs.NI · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7WWJUSB2F746EIQGGXXAFXKUYN}

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	2026-05-18T02:34:44.372083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdac9a483a2ff9e2220635ee02dd54c3722dcb0c4cb2a38b7d5e845b55de8167

Aliases

arxiv: 1411.5098 · arxiv_version: 1411.5098v1 · doi: 10.48550/arxiv.1411.5098 · pith_short_12: 7WWJUSB2F746 · pith_short_16: 7WWJUSB2F746EIQG · pith_short_8: 7WWJUSB2

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/7WWJUSB2F746EIQGGXXAFXKUYN \
  | 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: fdac9a483a2ff9e2220635ee02dd54c3722dcb0c4cb2a38b7d5e845b55de8167

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcf1b8a19689179b4bf7285764de5127b0f3019a97c89f9e11620b7c96d47a24",
    "cross_cats_sorted": [
      "cs.NI",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-11-19T02:42:59Z",
    "title_canon_sha256": "c755651e4cbc0c3a89f0bd9df1869cf806de72b4844845fe10ab8a0dbc95909d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.5098",
    "kind": "arxiv",
    "version": 1
  }
}