什么情况下矩阵ab= ba? 在线性代数中,矩阵AB = BA 的情况是两个矩阵的乘积可以满足交换律。 下面是一些情况下矩阵AB = BA 成立的常见情况:单位矩阵:单位矩阵是一个特殊的方阵,其主对角线上的元素都是1,其他元素 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ... 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ... 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ... 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ... 同样地,当取对数的底数相同时,两个数的乘积的对数等于这两个数的对数之和,即 ln(ab) = ln(a) + ln(b)。 这些性质可以在数学中使用,以简化对数的计算和处理。 其次,这里应该避开零特征值,因为由Binet-Cauchy公式知道n>m时,一定有det(AB)=0,所以一定有零特征值,但还是用上面反例,可以知道反过来并不成立。 所以题主应该想问:已知方阵AB=方阵BA,那么他们的非零特征值连同他们的重数都相同(如果非零特征值连同他们的重数都相同,显然那么他们的迹 ... 不对,二阶矩阵一个左上是1,一个右下是一,其余位置为零。就是一个反例。 貌似有r(AB)≥r(A)+r(B)-n当两者均为n阶 ... 基本不等式是指对于任意非负实数a和b,有以下不等式成立: a + b ≥ 2√(ab) 要证明为什么只有在a=b时,不等式达到最小值,我们可以使用平方差公式来分析。 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ...
2024.11.28 03:39 wizardmechanical RN jobs, Central AB
So, my spouse is an RN. She worked (is still internal for now) a public health position, fulfilling all the different roles/areas that they have. Shes Quite versatile! We had our 3rd and final baby to which in the middle of her mat leave we had moved to rural central AB. (From a northern isolated town, to Leduc) we absolutely love it in leduc, it's beautiful and the people are Great. But my God she's having the hardest time finding work. And because of having children she can't exactly take a 12 hour hospital job because I'm commuting up north for work.
My heart is breaking foe her. She's smart, a hard worker and she cares a lot about her career and the people she sees. But out of the countless, continuous job applications she's only received 1 interview ( and they got back and said it was between her and someone else for the position and they had no choice but to give it to the other person due to seniority)
How the hell are the younger nurse workforce supposed to get any better experience or even a job for that matter when it comes down to seniority getting the job no matter what. Even though someone else may have been a more compatible fit.
It sucks to see someone I love feel so defeated, and stressed and unwanted in a career she's passionate about and good at! It's getting to the point where she too may have to commute up north on my days off for casual just to keep hours up....thats going to be hard on our fam jam.
If anyone, has an in. Any in for an RN job that would like a passionate, caring and hard working nurse please forward it my way so I can share it with her. She's willing to travel an hour from our home for any position that allows her to get the kids before daycare ends.
I thank any feed back or help given. :) and in light of Christmas nearing. Have a great holiday with your families!
submitted by wizardmechanical to AHSEmployees [link] [comments]
2024.11.28 03:39 ExchangeFine4429 Anger and Swearing
Great, I'm back to square one where I Swear at anything that irritates me and get Angry at stupid stuff.
How do I control my Anger? Because when I was Saved, I had so much Control over my Anger and Cussing because I presume I was filled with the Holy Spirit, now it's come back!
submitted by ExchangeFine4429 to Christianity [link] [comments]
2024.11.28 03:39 Jaded-Term-3203 Has anyone here had a successful MTESE after a failed sperm mapping procedure?
Hi everyone. I had a failed FNA (Fine Needle Aspiration) procedure, also known as sperm mapping, by Dr. Turek earlier in the year. It showed SCO (Sertoli Cell Only) in each location. I am currently on multiple medications and am planning to have an MTESE sometime next year.
Has anyone had success with an MTESE after a failed sperm mapping or a diagnosis of Sertoli Cell Only? If so I would love to know your results. Both positive and negative. Or anyone who had an MTESE and how did it go and what was your circumstances?
This is a hard process. I am so glad for this group and everyone on here!
submitted by Jaded-Term-3203 to maleinfertility [link] [comments]
2024.11.28 03:39 marianto_23 Screen Share is half the size
Over the last few days a friend and I have been sharing his screen like usual with him on his computer and I am on my phone. And last week and for the last couple years we have had no issue. But all of a sudden when we watch things the screen is split in half even when I press full screen. And it makes it so his screen is hard to see. Is anyone else having this issue?
submitted by marianto_23 to discordapp [link] [comments]
2024.11.28 03:39 HyenaShot8896 AITC for being too mad to snuggle
Hi. I Luna 4yo F gray tuxxie who stays inside where safe, warm, and pampered Big cat sissy Sunny, and sissy Minnie sents me here cause meowmy sad, but I finks I is wright.
Every night I snuggles wff meowmy, but nots tonight. See meowmy mades me get in holds so she could take snippy fings, and cuts my caws. She swores it wouldn't hurt, and it didn't, but I no wike it any ways. Meowmy says I needs it so my wittle paws stop gettsing stucks when I makes bread. Meowmy helds me still to snip snip snip. I don't like holds, and snip snip snio sound weird, plus meowy has to holds my feets to does it. Now I mads, and don't wants to do nightly snuggles wiff meowmy, and she is sad. Minnie says I not the cloaca cause she no likes snips eiver. Meowmy says I am the cloaca because I feels better wiffout being stucks any more. So is I cloaca for no snuggles wiff meowmy tonight?
submitted by HyenaShot8896 to AmItheCloaca [link] [comments]
2024.11.28 03:39 Poldaramba Healthy Support Balances
Supports are the most popular & powerful role in the game, by a huge margin (just look at q times). Here are some constructive balance suggestions so that can hopefully bring the support power to a healthier level
Ana
-Primary weapon: scoped shots now have a linear damage fall-off from 20 meters, until 40 meters, where the shots do half the damage
-Bionade: no longer does damage or inflict antiheal debuff to enemies
-Sleep Dart: no longer paralyzes enemies, now slows enemy for 5 seconds
Baptiste
Primary weapon: maximum damage now reduced from 25 to 10. No longer critical hits enemy.
Immortality field: health reduced from 125 to 75. Now reduce the damage received by teammate by 50% instead of a health threshold.
Amplification matrix: damage amplified decreased from 100% to 50%
Brigitte:
Inspire: removed
Whip shot: damage reduced from 70 to 45
Rally: no longer generates overhealth to herself
Illari
Primary weapon: maximum charge damage reduced from 70-21 to 45 -15, minimum charge damage reduced from 20-6 to 10-0
Outburst: no longer deals damage
Captive sun: sunstruck explosion damage reduced from 160-120 to 120-80
Juno
Primary weapon: damage per round reduced from 7.5-2.25 to 4.5-1
Pulsar Torpedoes: damage reduced from 85 to 50
Orbital ray: no longer heals teammates
Kiriko
Kunai: damage reduced from 60 to 35
Protection Suzu: now becomes a instant effect (invulnerability duration removed). No longer heals teammates
Lifeweaver
Thorn volley: damage per shot reduced from 12 to 8
Petal platform: cooldown increased from 12 seconds to 25 seconds
Life grip: no longer heals teammates. Teammates during the grip is no longer invulnerable.
Tree of life: the 150 instant heal is removed. Healing per pulse is reduced from 90 to 50
Lucio
Primary weapon: damage per round reduced from 22 to 15
Amp it up: healing per second reduced from 52 to 35
Mercy
Caduceus staff: damage amplification reduced from 30% to 15%
Valkyrie: no longer gain the ability to fly
Moira
Biotic grasp: damage per second reduced from 65 to 30
Biotic orb: no longer deals damage. The damage orb now only restores biotic energy when close to enemy
Coalescence: damage per second reduced from 85 to 50. Healing per second reduced from 140 to 100
Zenyatta
Primary weapon: damage per orb reduced from 50 to 35
Orb of discord: damage amplification reduced from 25% to 15%
submitted by Poldaramba to Overwatch [link] [comments]
2024.11.28 03:39 avamsilva18 I love her so much..
New fav Tokidoki! submitted by avamsilva18 to Tokidoki [link] [comments] |
2024.11.28 03:39 Hulkisstronk What is this?
This post contains content not supported on old Reddit. Click here to view the full post
submitted by Hulkisstronk to Pixelary [link] [comments]
2024.11.28 03:39 bigguys45s The Duprees - “Why Don’t You Believe Me?” (1962/63, No. 37)
submitted by bigguys45s to TheHot100 [link] [comments] |
2024.11.28 03:39 Funny-Energy5767 Automate Fetching Azure Cost Analysis based on Resoucse only
I normally download the Cost of a subscription for each month by going to Subscription-->Cost Analysis-->Resources and download a resource only CSV. https://preview.redd.it/gfvny3kd6k3e1.png?width=1552&format=png&auto=webp&s=b3be7297f83b80c40763134e3e1ea28d6f163c89 https://preview.redd.it/fglwhri07k3e1.png?width=2192&format=png&auto=webp&s=25233514d97b79475fb3ce3067c6a2491f525763 This is handy for me because it has all the necessary Columns that I need and I just manually add the date into it. https://preview.redd.it/m38nmnlh7k3e1.png?width=2434&format=png&auto=webp&s=fdd9331858e39328e05def1f557151772cedbcd0 but recently I have tried using API to download these columns using a scripts by help of chatgpt. here is an example: # Fetch Cost Data def fetch_cost_data(): # Define the start and end dates for August 2024 start_date = "2024-08-01T00:00:00Z" end_date = "2024-08-31T23:59:59Z" # Cost Management Query for August 2024 query = { "type": "ActualCost", "timeframe": "Custom", "timePeriod": { "from": start_date, "to": end_date }, "dataset": { "granularity": "None", # No granularity, just monthly totals "aggregation": { "totalCost": {"name": "PreTaxCost", "function": "Sum"} }, "grouping": [ {"type": "Dimension", "name": "ResourceType"}, {"type": "Dimension", "name": "ResourceGroupName"}, {"type": "Dimension", "name": "ResourceLocation"}, {"type": "Dimension", "name": "SubscriptionName"} ] } } # Execute the query result = cost_client.query.usage( scope=f"/subscriptions/{SUBSCRIPTION_ID}", parameters=query ) # Print the structure of the returned result to check its format print(result) print(dir(result)) # List available attributes of the result object # Extract the data from the result rows = result.rows if hasattr(result, 'rows') else result.get('rows', []) # Extract column names columns = [col.name for col in result.columns] if hasattr(result, 'columns') else [] # Map rows into DataFrame-compatible format data = [dict(zip(columns, row)) for row in rows] # Return data as a DataFrame return pd.DataFrame(data) # Fetch the data df = fetch_cost_data() # Save the DataFrame to a CSV file csv_filename = "azure_cost_data_august_2024.csv" df.to_csv(csv_filename, index=False) Now the issue is that I can't find a the Resource name column using API, and I think it maybe related to "type": "ActualCost", because when I do a manual export to a storage account using "Cost and Usage (Focus)" In the export file I can see all the Columns that I need but If I do an "Cost and Usage (actual)" I don't get a Resource Name column in exported file. Basically, All I need a script that can pull out bellow columns for me for a period that I define. https://preview.redd.it/e19geeefck3e1.png?width=2434&format=png&auto=webp&s=20dcf9d28728de02d4a1aede4fbbf49d072497be https://preview.redd.it/sybg8s5bbk3e1.png?width=1180&format=png&auto=webp&s=9f8bf2ff8e8bf3a895a19b2ebea33da22be4514e any sort of help would be appreciated. Thanks submitted by Funny-Energy5767 to AZURE [link] [comments] |
2024.11.28 03:39 macetfromage What is red part?
submitted by macetfromage to AskMechanics [link] [comments] |
2024.11.28 03:39 guanaco55 ATV rider's body recovered from Kuskokwim River near Napaskiak
submitted by guanaco55 to alaska [link] [comments] |
2024.11.28 03:39 Mazapan7700 Small Collection
submitted by Mazapan7700 to MangaCollectors [link] [comments] |
2024.11.28 03:39 bluervirt Network Solutions Black Friday 2024
Follow this link for Network Solutions Black Friday 2024. Access the latest deals and promotions by visiting the link, featuring a constantly updated list of coupons, promo codes, and discounts.
submitted by bluervirt to DiscountExpressive [link] [comments]
2024.11.28 03:39 Isky6999 Are nonchalant dreadheads real
submitted by Isky6999 to teenagers [link] [comments]
2024.11.28 03:39 _OddLaw Foxtrot Mike quality question…
NJ Gs,
Turkey day sales have me glued to this stupid phone. Came across a Foxtrot Mike-15 complete ambi lower and am curious if any of you have exp with their guns/quality. Given the price range, are they generally in the same ballpark as PSA/Aero etc? Any help would be greatly appreciated.
Also, Primary Arms has some pretty good deals running on everything from sights, barrels, lowers, uppers, triggers, etc.
https://www.primaryarms.com/foxtrot-mike-products-mike-15-complete-billet-lower-receiver
submitted by _OddLaw to NJGuns [link] [comments]
2024.11.28 03:39 warlordcoyote37 Thinking of buying my first uni
Helloooo I’m new to this subreddit. I wanted to ask about tamagotchi uni I had a gen 2 for some time and now I’m considering to get the uni is there anything I should know before purchasing one? Alsoooo is there multiplayer on it :>?
submitted by warlordcoyote37 to tamagotchi [link] [comments]
2024.11.28 03:39 ConfidentChain9150 Visual-audio childrens book to learn English?
Does anyone know of good sites or platforms for visual audio children's books that kids can read and follow along to without having a parent read to them?
I have a friend who lives in Brazil with toddlers and she wants them to learn English but is struggling to find adequate content for children. She also does not speak English well so she does not want to read the English children's books she found to her kids, for fear of mispronouncing words and having them learn incorrectly.
Any recommendations would help, either paid or free sites/platforms. Thanks!
submitted by ConfidentChain9150 to audiobooks [link] [comments]
2024.11.28 03:39 doty2014 Ideas? Thanks!
My wife and I moved into this home 3 years ago and have yet to decorate anything. Just looking for some advice and opinions. Thanks!
submitted by doty2014 to DesignMyRoom [link] [comments]
2024.11.28 03:39 trentgebben 12T Cat
In the middle of a rebuild
View Poll
submitted by trentgebben to dynastybb [link] [comments]
2024.11.28 03:39 Fabulous_Tradition_9 Eternity Isle fragments
Would someone be willing to give me one each of the broken sword fragment and toonish canister fragment? That way they’ll show up when I use a timebending table. I have plenty of dismantled fragments to use and I’m trying to get to 100%, but these fragments never show up 😭
submitted by Fabulous_Tradition_9 to DreamlightValley [link] [comments]
2024.11.28 03:39 CrazyRealistic You got $300 to start a collection…what do you buy first?
Just wanting to see some opinions.
**also is eBay a good spot to purchase?
submitted by CrazyRealistic to Colognes [link] [comments]
2024.11.28 03:39 GuiltyEdge4530 24 [M4F] LF longtime sexual partner
Hello! I’m looking for someone that is interested in exclusive sexual relationship (not romantic). I am okay with just meeting once a week, even directly to the room (no coffees or anything)
About me: - 5'7 - 75 kgs - around 7/10 looks only - moreno - from South but can go anywhere - can’t host but willing to shoulder check-in - has 5+ inch girthy dick - loves receiving head
Feel free to dm me so we can exchange pics
submitted by GuiltyEdge4530 to PHR4Rhookups2 [link] [comments]
2024.11.28 03:39 BackgroundCharity280 Does this exist?
My grandmother recently passed away. She had a cleft pallet that wasn’t corrected until she was in her late teens. It gave her lips a very distinct look. Does anyone know of a sculpt with a cleft pallet (corrected or not)?
submitted by BackgroundCharity280 to reborndolls [link] [comments]
2024.11.28 03:39 DesignerDress9893 I need dropshiping partner from USA
I have pretty good knowledge about dropshiping
If anyone interested in dropshiping from USA just dm
I am genuine guy who really wants partner to work with it and grow together
I am not a scammer
submitted by DesignerDress9893 to dropshipping [link] [comments]