Pith Number

pith:J5QDX56O

pith:2021:J5QDX56O5K52EJRYSMXZKRKB5M

not attested not anchored not stored refs pending

A fast and Accurate Similarity-constrained Subspace Clustering Framework for Unsupervised Hyperspectral Image Classification

Carlos Hinojosa, Esteban Vera, Henry Arguello

arxiv:2104.06975 v2 · 2021-04-14 · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J5QDX56O5K52EJRYSMXZKRKB5M}

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	2026-07-05T03:35:28.342785Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f603bf7ceeabba22638932f954541eb18ce7d319885e2018380711646274931

Aliases

arxiv: 2104.06975 · arxiv_version: 2104.06975v2 · doi: 10.48550/arxiv.2104.06975 · pith_short_12: J5QDX56O5K52 · pith_short_16: J5QDX56O5K52EJRY · pith_short_8: J5QDX56O

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/J5QDX56O5K52EJRYSMXZKRKB5M \
  | 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: 4f603bf7ceeabba22638932f954541eb18ce7d319885e2018380711646274931

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e1a42fcde785f0728641718108f256ba825593bdc65509fd198f5e6d709cc39",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2021-04-14T16:58:12Z",
    "title_canon_sha256": "fe9866885d9f8cb2fffe0f19dc92afc13ee6af5ea03c260f36fef290c57f6572"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.06975",
    "kind": "arxiv",
    "version": 2
  }
}