The idea might be similar to <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Non-standard_analysis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Non-standard_analysis</a><p>Edit: Actually, <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Smooth_infinitesimal_analysis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Smooth_infinitesimal_analysis</a> seems much closer.