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  2. Closed range theorem - Wikipedia

    en.wikipedia.org/wiki/Closed_range_theorem

    Now, if ⁡ is closed, then it is Banach and so by the open mapping theorem, is a topological isomorphism. It follows that T 0 ′ {\displaystyle T_{0}'} is an isomorphism and then im ⁡ ( T ′ ) = ker ⁡ ( T ) ⊥ {\displaystyle \operatorname {im} (T')=\operatorname {ker} (T)^{\bot }} .

  3. Sumatra PDF - Wikipedia

    en.wikipedia.org/wiki/Sumatra_PDF

    Sumatra has a minimalist design, with its simplicity attained at the cost of extensive features. For rendering PDFs, it uses the MuPDF library. [4]Sumatra was designed for portable use, as it consists of one file with no external dependencies, making it usable from an external USB drive, needing no installation. [5]

  4. Comparison of disc image software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_disc_image...

    Download as PDF; Printable version ... Notable software applications that can access or manipulate disk image files are as ... ISO: Windows: Freeware: Image for ...

  5. Uniform boundedness principle - Wikipedia

    en.wikipedia.org/wiki/Uniform_boundedness_principle

    Indeed, the elements of define a pointwise bounded family of continuous linear forms on the Banach space := ′, which is the continuous dual space of . By the uniform boundedness principle, the norms of elements of S , {\displaystyle S,} as functionals on X , {\displaystyle X,} that is, norms in the second dual Y ″ , {\displaystyle Y'',} are ...

  6. File viewer - Wikipedia

    en.wikipedia.org/wiki/File_viewer

    A file viewer is a utility application software on operating systems, such as Linux, macOS, or Windows. The file viewer is responsible for user access of files located on a data storage device . File viewers allow the user to open and view content [ 1 ] on a device, such as a Personal Computer (PC) or a mobile phone .

  7. Download, install, or uninstall AOL Desktop Gold - AOL Help

    help.aol.com/articles/aol-desktop-downloading...

    Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.

  8. Open mapping theorem (functional analysis) - Wikipedia

    en.wikipedia.org/wiki/Open_mapping_theorem...

    In functional analysis, the open mapping theorem, also known as the Banach–Schauder theorem or the Banach theorem [1] (named after Stefan Banach and Juliusz Schauder), is a fundamental result that states that if a bounded or continuous linear operator between Banach spaces is surjective then it is an open map.

  9. Banach space - Wikipedia

    en.wikipedia.org/wiki/Banach_space

    In mathematics, more specifically in functional analysis, a Banach space (pronounced ) is a complete normed vector space.Thus, a Banach space is a vector space with a metric that allows the computation of vector length and distance between vectors and is complete in the sense that a Cauchy sequence of vectors always converges to a well-defined limit that is within the space.