Opportunity dossier O-0068

Recurring need documented in 1 independent public source item.

Original-language research note

网页PDF完整转换开源工具
将含数学公式的网页完整转换为PDF的开源替代方案

First seen 2026-06-14 · Last updated 2026-07-15 · Recalculated daily

2.1

Evidence confidence, not a return forecast

Independent source items, deduplicated by post

Public source families

Payment evidence: current spend or explicit intent

ProblemThe source-linked evidence below documents the recurring problem.

People affectedPeople represented in the linked public discussions.

Named alternativesNo existing alternative is named in the qualifying evidence yet.

Weekly mentions · 12 weeks▼ Fading

04-2705-2506-2207-13

Trend factor ×0.5, capped at 2.0.

Representative evidence

1 public excerpts · 1 items in the full chain

Need★★★☆☆Feature request

https://fullpagepdf.com/ 是唯一能够将 https://www.khanacademy.org/math/ap calculus ab/ab diff analytical applications new/ab 5 6b/a/review analyzing the second derivative to find inflection points 正确转换为PDF的 Chinese research excerpt

Use the source link for the original-language context.

SoftwareRecs SE2026-06-14View source ↗

Follow the full evidence chain

Traceable items · inspectable scoring · warming and payment alerts

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Scoring summary

Evidence confidence = strength × evidence volume × source diversity × payment × competition × trend × 10. Counts use independent content items; only first-hand pain, current spend, explicit willingness to pay and concrete feature requests affect the score. Repeated posts by one author are discounted. Scoring and status changes follow deterministic rules.

“Evidence-backed” means the problem appears real, recurring and connected to spending. It does not mean the business is worth building. Read the full methodology.