NotExists 
NotExists[x, y]
显示为 .
范例
基本范例 (1)
历史
1996年引入 (3.0)
文本
Wolfram Research (1996),NotExists,Wolfram 语言函数,https://reference.wolfram.com/language/ref/NotExists.html.
CMS
Wolfram 语言. 1996. "NotExists." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/NotExists.html.
APA
Wolfram 语言. (1996). NotExists. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/NotExists.html 年
BibTeX
@misc{reference.wolfram_2025_notexists, author="Wolfram Research", title="{NotExists}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/NotExists.html}", note=[Accessed: 05-October-2025]}
BibLaTeX
@online{reference.wolfram_2025_notexists, organization={Wolfram Research}, title={NotExists}, year={1996}, url={https://reference.wolfram.com/language/ref/NotExists.html}, note=[Accessed: 05-October-2025]}