Pith Number

pith:PHJBL7W3

pith:2015:PHJBL7W3VNXXSMWDPQTZFG6XCA

not attested not anchored not stored refs pending

Simultaneously sparse and low-rank abundance matrix estimation for hyperspectral image unmixing

Athanasios Rontogiannis, Konstantinos Koutroumbas, Konstantinos Themelis, Paris Giampouras

arxiv:1504.01515 v2 · 2015-04-07 · cs.CV · math.OC · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PHJBL7W3VNXXSMWDPQTZFG6XCA}

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	2026-05-18T01:08:13.416298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79d215fedbab6f7932c37c27929bd71038593cd0d9e899e22e69c6d98ec54df0

Aliases

arxiv: 1504.01515 · arxiv_version: 1504.01515v2 · doi: 10.48550/arxiv.1504.01515 · pith_short_12: PHJBL7W3VNXX · pith_short_16: PHJBL7W3VNXXSMWD · pith_short_8: PHJBL7W3

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/PHJBL7W3VNXXSMWDPQTZFG6XCA \
  | 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: 79d215fedbab6f7932c37c27929bd71038593cd0d9e899e22e69c6d98ec54df0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64e920dfcdbb2c499f0ac4fa233fb797a5a408c65be89973ba78b0509037db80",
    "cross_cats_sorted": [
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-04-07T08:23:45Z",
    "title_canon_sha256": "aab12209d600b66fe0513354f6c7108df23e708829c27de1310d18e988fdaac5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01515",
    "kind": "arxiv",
    "version": 2
  }
}