Pith Number

pith:AU4ZFUJO

pith:2019:AU4ZFUJO4KFBNKOE7C4VEXKAKK

not attested not anchored not stored refs pending

Semi-supervised Learning for Acoustic Impedance Inversion

Ghassan AlRegib, Motaz Alfarraj

arxiv:1905.13412 v1 · 2019-05-31 · eess.IV · eess.SP · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AU4ZFUJO4KFBNKOE7C4VEXKAKK}

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	2026-05-17T23:44:34.980738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

053992d12ee28a16a9c4f8b9525d4052af58847cdd76765f19ebc35fdf0c1bd2

Aliases

arxiv: 1905.13412 · arxiv_version: 1905.13412v1 · doi: 10.48550/arxiv.1905.13412 · pith_short_12: AU4ZFUJO4KFB · pith_short_16: AU4ZFUJO4KFBNKOE · pith_short_8: AU4ZFUJO

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/AU4ZFUJO4KFBNKOE7C4VEXKAKK \
  | 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: 053992d12ee28a16a9c4f8b9525d4052af58847cdd76765f19ebc35fdf0c1bd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9459fd1c86da4a3d12c77f7f44254ee6bd2058a2be6c2a2801358c67b8911e60",
    "cross_cats_sorted": [
      "eess.SP",
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2019-05-31T04:36:03Z",
    "title_canon_sha256": "c1ed160a2aca63501ed77b06bdc06bf339363a7f12d881d1e638ceab58625537"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.13412",
    "kind": "arxiv",
    "version": 1
  }
}