The associated topology is the constructible topology on x . 相應(yīng)的拓?fù)涫荴之上的可構(gòu)造拓?fù)洹?i class="labawb" onClick="playMp3('sound_c_1')">
He conceived the first proof that the 17-sided polygon is constructible . 他構(gòu)思了17邊形可以作圖的第一個(gè)證明。
The associated topology is the constructible topology on x 相應(yīng)的拓?fù)涫莤之上的可構(gòu)造拓?fù)洹?
When the complementary sequences can be constructed , it is called constructible complementary sequence 特征序列對(duì)研究互補(bǔ)序列的特性具有重要意義。
Now there are 5 constructive methods have been found , through which all of the complementary sequences whose length is 2 ' 10s26 " can be constructed . it was proved in this paper that it can determine which equivalence class is constructible or not by the feature seque nce . based on the reseach and computer we have got all the equivalence complementary sequence class with length of not more than 40 , and found a new complementary sequences kernel with length of 20 經(jīng)分析發(fā)現(xiàn)當(dāng)序列長(zhǎng)度n 4時(shí),可以根據(jù)特征序列來(lái)判斷互補(bǔ)序列等價(jià)類空間大小,這對(duì)實(shí)際應(yīng)用中互補(bǔ)序列的選取具有一定意義;此外本文證明了互補(bǔ)序列等價(jià)類的唯一性,即不同的等價(jià)類不能包含相同的序列;對(duì)互補(bǔ)序列的各種構(gòu)造方法進(jìn)行分析,發(fā)現(xiàn)通過(guò)每種構(gòu)造方法構(gòu)造出的互補(bǔ)序列其特征序列均具有某種特性,通過(guò)論證得出可以通過(guò)特征序列來(lái)判斷互補(bǔ)序列是否是可構(gòu)造的以及可以由哪種構(gòu)造方法構(gòu)造,并通過(guò)特征序列證實(shí)了長(zhǎng)度為20的互補(bǔ)序列的核的存在性。