Pith Number

pith:7U5BEFA7

pith:2014:7U5BEFA7EPFJO4IDQJU5U44O6X

not attested not anchored not stored refs pending

Super-resolution, Extremal Functions and the Condition Number of Vandermonde Matrices

Ankur Moitra

arxiv:1408.1681 v4 · 2014-08-07 · cs.IT · cs.DS · math.IT · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7U5BEFA7EPFJO4IDQJU5U44O6X}

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	2026-05-18T02:17:33.674697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd3a12141f23ca9771038269da738ef5deca3aec0a3ef24ef786b2c9bd7cb7c8

Aliases

arxiv: 1408.1681 · arxiv_version: 1408.1681v4 · doi: 10.48550/arxiv.1408.1681 · pith_short_12: 7U5BEFA7EPFJ · pith_short_16: 7U5BEFA7EPFJO4ID · pith_short_8: 7U5BEFA7

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/7U5BEFA7EPFJO4IDQJU5U44O6X \
  | 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: fd3a12141f23ca9771038269da738ef5deca3aec0a3ef24ef786b2c9bd7cb7c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4876f03ff2c13dc2a76053c295abcbc1325a5882ef17ac131d79df7e71e7135a",
    "cross_cats_sorted": [
      "cs.DS",
      "math.IT",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-08-07T18:54:19Z",
    "title_canon_sha256": "41bc71df5899fb2ec191d1a1b0b15c848da53200c1c307b912ac6a176c4885e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.1681",
    "kind": "arxiv",
    "version": 4
  }
}