Pith Number

pith:2MHYWC3X

pith:2015:2MHYWC3X42VGZBXTLHK47FJRVN

not attested not anchored not stored refs pending

Sparse Multi-layer Image Approximation: Facial Image Compression

Dimche Kostadinov, Sohrab Ferdowsi, Svyatoslav Voloshynovskiy

arxiv:1506.03998 v1 · 2015-06-12 · cs.CV · cs.IT · 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{2MHYWC3X42VGZBXTLHK47FJRVN}

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	2026-05-18T01:51:18.575299Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d30f8b0b77e6aa6c86f359d5cf9531ab6252755eb59a61ad540c510cf55be9f8

Aliases

arxiv: 1506.03998 · arxiv_version: 1506.03998v1 · doi: 10.48550/arxiv.1506.03998 · pith_short_12: 2MHYWC3X42VG · pith_short_16: 2MHYWC3X42VGZBXT · pith_short_8: 2MHYWC3X

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/2MHYWC3X42VGZBXTLHK47FJRVN \
  | 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: d30f8b0b77e6aa6c86f359d5cf9531ab6252755eb59a61ad540c510cf55be9f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1019689af3c39e2e6442d0b6f47b95d39f6422c0098be32a195e7d35a8a3b1e",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-06-12T12:10:57Z",
    "title_canon_sha256": "2e34186f8d15eafd97fd7a4ae7bb0c418e4fee5493f1b75ff785c8f26e631f81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.03998",
    "kind": "arxiv",
    "version": 1
  }
}