Pith Number

pith:IEPPPJLN

pith:2015:IEPPPJLNDLQEWCEDWP3XXQWWA6

not attested not anchored not stored refs pending

Orthogonal Representations, Projective Rank, and Fractional Minimum Positive Semidefinite Rank: Connections and New Directions

David E. Roberson, Kevin F. Palmowski, Leslie Hogben, Simone Severini

arxiv:1502.00016 v2 · 2015-01-30 · math.CO · quant-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{IEPPPJLNDLQEWCEDWP3XXQWWA6}

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	2026-05-18T00:26:52.226955Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

411ef7a56d1ae04b0883b3f77bc2d607bf2a621926d557b1c07fa50abff88e80

Aliases

arxiv: 1502.00016 · arxiv_version: 1502.00016v2 · doi: 10.48550/arxiv.1502.00016 · pith_short_12: IEPPPJLNDLQE · pith_short_16: IEPPPJLNDLQEWCED · pith_short_8: IEPPPJLN

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/IEPPPJLNDLQEWCEDWP3XXQWWA6 \
  | 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: 411ef7a56d1ae04b0883b3f77bc2d607bf2a621926d557b1c07fa50abff88e80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c36591f8684ef9d9c8c71715ad6cf30333f19be276d410e57cc38d99f09bb15",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-01-30T21:17:27Z",
    "title_canon_sha256": "831912be0e5029fc768bd6cd7ffafc71702fffe9520bf963c76e4a6ef8b1f4ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00016",
    "kind": "arxiv",
    "version": 2
  }
}