概念
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/0/d2a/nBnauM3XwgzMyMjMwkzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL5MzLzQzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/94d/nBnauM3XxYzM2AzMxMTMzEDN0UTMyITNykTO0EDMwAjMwUzLzEzLyUzLt92YucmbvRWdo5Cd0FmLyE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/f/61e/nBnauM3X2gDNygzNzETNxEDO1UTM1QDN5MjM5ADMwAjMwUzLxUzL1MzLt92YucmbvRWdo5Cd0FmLyE2LvoDc0RHa.jpg)
單調遞增一元函式概念在對偶作用意義下的無窮維推廣,設 是巴拿赫空間, 為 的對偶空間, ⊂ , ,若有
![單調映射](/img/2/8e4/nBnauM3X4YDMycDMxYzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL2MzL2EzLt92YucmbvRWdo5Cd0FmLwE2LvoDc0RHa.jpg)
![單調映射](/img/4/f9d/nBnauM3XwczM3ATO1cjN1IDN0UTMyITNykTO0EDMwAjMwUzL3YzL0gzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/6af/nBnauM3XzcDN0YzN1kTOxMzM1UTM1QDN5MjM5ADMwAjMwUzL5kzL0UzLt92YucmbvRWdo5Cd0FmLwE2LvoDc0RHa.jpg)
![單調映射](/img/4/f9d/nBnauM3XwczM3ATO1cjN1IDN0UTMyITNykTO0EDMwAjMwUzL3YzL0gzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
則稱 為單調映射。若上式子中的等號僅當 時成立,則稱 為嚴格單調映射。若存在連續函式
![單調映射](/img/c/b81/nBnauM3XyMzN1UTM1ETNxEDO1UTM1QDN5MjM5ADMwAjMwUzLxUzLwAzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/d/d45/nBnauM3XygzN2ATN1MDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzQzL4czLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/8/a02/nBnauM3XwczMygjNwQDNxEDO1UTM1QDN5MjM5ADMwAjMwUzL0QzL0IzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
使得
![單調映射](/img/0/16b/nBnauM3XzcDOxIDO0MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL2EzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/4/f9d/nBnauM3XwczM3ATO1cjN1IDN0UTMyITNykTO0EDMwAjMwUzL3YzL0gzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
則稱 為強單調映射。
基本原理
![單調映射](/img/9/c63/nBnauM3X2QDOyAjN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzL0UzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/a/85c/nBnauM3X4UDN5ATM2MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL1EzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/e/891/nBnauM3XyAzMzMTN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzLyIzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/f/abb/nBnauM3X0czMwcDM2QzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL0MzL2AzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/a/347/nBnauM3X4ATMycDNzMjM0EDN0UTMyITNykTO0EDMwAjMwUzLzIzL1MzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/9/573/nBnauM3XyYTM2cjMwkDO0ATN0UTMyITNykTO0EDMwAjMwUzL5gzL1EzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/0/49c/nBnauM3X3MTOwEjN2kDNxEDO1UTM1QDN5MjM5ADMwAjMwUzL5QzL3gzLt92YucmbvRWdo5Cd0FmLyE2LvoDc0RHa.jpg)
![單調映射](/img/0/416/nBnauM3X1MDM4gTO2ETNxEDO1UTM1QDN5MjM5ADMwAjMwUzLxUzL0UzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/5/533/nBnauM3XyQjN2QzM3kzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL5MzL2EzLt92YucmbvRWdo5Cd0FmLyE2LvoDc0RHa.jpg)
![單調映射](/img/5/4d8/nBnauM3X2MzN5UzM2MzNwIDN0UTMyITNykTO0EDMwAjMwUzLzczL4MzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/9/573/nBnauM3XyYTM2cjMwkDO0ATN0UTMyITNykTO0EDMwAjMwUzL5gzL1EzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
定義:設 , , , 為有序集,稱函式 為 到 的單調映射。如果對任意 滿足 蘊含 ,則稱 為 到 的嚴格單調映射。
![單調映射](/img/9/c63/nBnauM3X2QDOyAjN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzL0UzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/a/85c/nBnauM3X4UDN5ATM2MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL1EzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/e/891/nBnauM3XyAzMzMTN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzLyIzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/f/abb/nBnauM3X0czMwcDM2QzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL0MzL2AzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/a/347/nBnauM3X4ATMycDNzMjM0EDN0UTMyITNykTO0EDMwAjMwUzLzIzL1MzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/0/7fa/nBnauM3X4EzMwgTN3YDNwYjN1UTM1QDN5MjM5ADMwAjMwUzL2QzL3QzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/63b/nBnauM3XwYTNzQjN5YDNxEDO1UTM1QDN5MjM5ADMwAjMwUzL2QzL1czLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/6/037/nBnauM3XyQjM3UTM4UTNwgDM1UTM1QDN5MjM5ADMwAjMwUzL1UzLwMzLt92YucmbvRWdo5Cd0FmLyE2LvoDc0RHa.jpg)
定理:設 , , , 為有序集, , 為單調映射,那么 為 到 的單調映射。
![單調映射](/img/9/c63/nBnauM3X2QDOyAjN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzL0UzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/a/85c/nBnauM3X4UDN5ATM2MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL1EzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/e/891/nBnauM3XyAzMzMTN2IDNxEDO1UTM1QDN5MjM5ADMwAjMwUzLyQzLyIzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/f/abb/nBnauM3X0czMwcDM2QzMxEDO1UTM1QDN5MjM5ADMwAjMwUzL0MzL2AzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/3/ae7/nBnauM3XzEzM0YTM4kTNwMDN0UTMyITNykTO0EDMwAjMwUzL5UzL4EzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/4/2e5/nBnauM3X4czMxQDOwITO5ADN0UTMyITNykTO0EDMwAjMwUzLykzLxEzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/c/23c/nBnauM3X3YDMxADO1MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL3YzLt92YucmbvRWdo5Cd0FmL0E2LvoDc0RHa.jpg)
![單調映射](/img/a/347/nBnauM3X4ATMycDNzMjM0EDN0UTMyITNykTO0EDMwAjMwUzLzIzL1MzLt92YucmbvRWdo5Cd0FmLzE2LvoDc0RHa.jpg)
![單調映射](/img/f/663/nBnauM3X3AzMwUDN5ETNxEDO1UTM1QDN5MjM5ADMwAjMwUzLxUzLyQzLt92YucmbvRWdo5Cd0FmLwE2LvoDc0RHa.jpg)
![單調映射](/img/9/573/nBnauM3XyYTM2cjMwkDO0ATN0UTMyITNykTO0EDMwAjMwUzL5gzL1EzLt92YucmbvRWdo5Cd0FmLxE2LvoDc0RHa.jpg)
![單調映射](/img/9/59d/nBnauM3X4UTN4YzN1MTNxEDO1UTM1QDN5MjM5ADMwAjMwUzLzUzL4UzLt92YucmbvRWdo5Cd0FmLwE2LvoDc0RHa.jpg)
定理:設 , , , 為有序集, ⊆ 為 中的 鏈, 為單調映射,那么 為 中的 鏈。