Pith Number

pith:OW2AT54A

pith:2015:OW2AT54A2UOPDDWGTV7ITRF5VE

not attested not anchored not stored refs pending

On the Invariance of Dictionary Learning and Sparse Representation to Projecting Data to a Discriminative Space

Ali Ghodsi, Mehrdad J. Gangeh

arxiv:1503.02041 v2 · 2015-03-06 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OW2AT54A2UOPDDWGTV7ITRF5VE}

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	2026-05-18T01:53:08.763561Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75b409f780d51cf18ec69d7e89c4bda92f1614299c95eba3b053ea0969b78016

Aliases

arxiv: 1503.02041 · arxiv_version: 1503.02041v2 · doi: 10.48550/arxiv.1503.02041 · pith_short_12: OW2AT54A2UOP · pith_short_16: OW2AT54A2UOPDDWG · pith_short_8: OW2AT54A

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/OW2AT54A2UOPDDWGTV7ITRF5VE \
  | 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: 75b409f780d51cf18ec69d7e89c4bda92f1614299c95eba3b053ea0969b78016

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4f76619e6fb387650e338d8d0cb427aedf7474d81426a0308ee27a60f04bee5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-03-06T19:41:09Z",
    "title_canon_sha256": "d80e154add13225397304e60b661ed52999cf90196f392b6479ad2beba7bec78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02041",
    "kind": "arxiv",
    "version": 2
  }
}